| 单词 | positive charge |
| 例句 | The protons have a positive charge and the electrons an equal negative charge. Cosmos 1980-01-01T00:00:00Z The atom as a whole carried a neutral charge: the negative charges of its orbital electrons balanced the positive charge of the nucleus, the latter created by an excess of protons over electrons. Big Science 2015-07-07T00:00:00Z There was also the problem of how protons with their positive charges could bundle together inside the nucleus without blowing themselves and the rest of the atom apart. A Short History of Nearly Everything 2003-05-06T00:00:00Z The force between two positive charges is repulsive, as is the force between two negative charges, but the force is attractive between a positive and a negative charge. A Brief History of Time: And Other Essays 1988-01-01T00:00:00Z The goddess may appear to be going ballistic, but it serves the cosmic balance, for which the positive charge of female energy is indispensable. Got an Hour? See the Met These 4 Ways 2016-12-08T05:00:00Z Similarly, the huge negative charge at the bottom of a cloud induces a positive charge in other clouds or in the ground. What goes on when lightning strikes? 2013-05-25T23:07:12Z However, when the pH was adjusted to one extreme or the other, by adding either a strong acid or base, the negative or positive charges within the glue were neutralized, and the adhesion disappeared. Recycling of water-based adhesive achieved by changing pH 2023-11-13T05:00:00Z Models confirmed the macrocycles' structure and positive charge of its binding activity. Synthetic molecules can 'ferry' mucus-clearing ions blocked by cystic fibrosis 2023-10-10T04:00:00Z But these MOFs store less hydrogen than their nickel-based cousins, because only a subset of the vanadium atoms have the right number of positive charges to attract hydrogen. Chemical cages could store hydrogen, expand use of clean-burning fuel 2023-09-27T04:00:00Z For example, antiprotons have a negative charge while protons have a positive charge. Down goes antimatter! Gravity's effect on matter's elusive twin is revealed 2023-09-27T04:00:00Z The antimatter counterpart to the negatively charged electron, for example, is the positron, which has the same mass and spin but a positive charge rather than a negative one. What Happens if You Drop Antimatter? New Gravitational Test Sees First Fall 2023-09-27T04:00:00Z Due to the particular electronic properties of the nickel atoms, positive charges are scattered more strongly than negative charges, resulting in the desired imbalance and hence a high thermoelectric voltage. Golden future for thermoelectrics 2023-09-18T04:00:00Z And now the tiny, pristine sphere of positive charge of my physics education has become a sea of quarks and antiquarks with three valence quarks bobbing on its surface, all held together by gluons. Readers Respond to the March 2023 Issue 2023-07-01T04:00:00Z When polar covalent bonds containing a hydrogen atom form, the hydrogen atom in that bond has a slightly positive charge. Concepts of Biology 2013-04-25T00:00:00Z The paint, which Lamb said has the consistency of talc, shoots out from a gun with a positive charge. Advice | How to salvage rusted patio furniture 2023-03-03T05:00:00Z In the other option, the extra proton sits between the negative ends of two neutral water molecules so that each shares the burden of the positive charge. In a First, Scientists See How Water Stores Extra Protons 2022-11-23T05:00:00Z In the alloys studied here, the positive charges are strongly scattered by the nickel electrons, while the negative charges can move practically undisturbed. Golden future for thermoelectrics 2023-09-18T04:00:00Z Each excited electron leaves behind an electron vacancy, also known as a “hole,” which carries a positive charge. Ultrathin organic solar cells could turn buildings into power generators 2022-11-10T05:00:00Z A negatively charged chloride ion is surrounded by the partially positive charges of hydrogen atoms in water molecules. Concepts of Biology 2013-04-25T00:00:00Z The contrast between the negative charge at the bottom of the cloud and positive charge near the ground triggers lightning. ‘Gigantic jet’ lightning is a mystery. These researchers are solving it. 2022-08-03T04:00:00Z The motion of a positive charge is equivalent to the motion of a negative charge in the opposite direction. College Physics for AP Courses 2015-08-12T00:00:00Z At distances less than the bond distance, the positive charges on the two nuclei repel each other, and the overall energy increases. Chemistry 2019-02-14T00:00:00Z Although not significant contributors to mass, electrons do contribute greatly to the atom’s charge, as each electron has a negative charge equal to the positive charge of a proton. Biology for AP Courses 2022-06-09T00:00:00Z The uneven distribution of H+ ions across the membrane establishes an electrochemical gradient, owing to the H+ ions’ positive charge and their higher concentration on one side of the membrane. Concepts of Biology 2013-04-25T00:00:00Z It contains six protons, which have a positive charge, and six neutrons, which are neutral. Astronomy 2016-10-13T00:00:00Z Note that the electric field is defined for a positive test charge q , so that the field lines point away from a positive charge and toward a negative charge. College Physics for AP Courses 2015-08-12T00:00:00Z If the atoms continue to approach each other, the positive charges in the two nuclei begin to repel each other, and the potential energy increases. Chemistry 2019-02-14T00:00:00Z In NH2 , the nitrogen atom acquires a partial positive charge and the hydrogen atoms acquire a partial negative charge. Biology for AP Courses 2022-06-09T00:00:00Z As these icy particles bump into one another, they transfer electrical charges: the larger graupel tend to become negatively charged, whereas the smaller ice crystals end up with a positive charge. Salty Sea Spray Keeps Lightning Strikes Away 2022-08-02T04:00:00Z However, every nucleus, even simple hydrogen, has protons—and protons all have positive charges. Astronomy 2016-10-13T00:00:00Z The number of field lines leaving a positive charge or entering a negative charge is proportional to the magnitude of the charge. College Physics for AP Courses 2015-08-12T00:00:00Z The sum of the partial negative and partial positive charges for each water molecule is zero, and the water molecule is neutral. Chemistry 2019-02-14T00:00:00Z In LiF , the lithium atom acquires a negative charge, and the fluorine atom acquires a positive charge. Biology for AP Courses 2022-06-09T00:00:00Z Protons have a positive charge, and neutrons carry no charge at all. Miller & Levine Biology 2018-01-01T00:00:00Z About 1% of cosmic rays have masses equal to the mass of the electron, and 10–20% of these carry positive charge rather than the negative charge that characterizes electrons. Astronomy 2016-10-13T00:00:00Z Where the image is light, the selenium becomes conducting, and the positive charge is neutralized. College Physics for AP Courses 2015-08-12T00:00:00Z High temperatures are required to give the nuclei enough kinetic energy to overcome the very strong repulsion resulting from their positive charges. Chemistry 2019-02-14T00:00:00Z Oxygen is more electronegative than hydrogen, generating a partial positive charge near the oxygen atoms. Biology for AP Courses 2022-06-09T00:00:00Z All atoms are electrically neutral because the positive charge of the protons and the negative charge of the electrons cancel out. Miller & Levine Biology 2018-01-01T00:00:00Z An atom that has become positively ionized has lost a negative charge—the missing electron—and thus is left with a net positive charge. Astronomy 2016-10-13T00:00:00Z Next, a blank piece of paper is given a greater positive charge than on the drum so that it will pull the toner from the drum. College Physics for AP Courses 2015-08-12T00:00:00Z Likewise, removing an electron from a cation with a higher positive charge is more difficult than removing an electron from an ion with a lower charge. Chemistry 2019-02-14T00:00:00Z When unmodified, the histone proteins have a large positive charge; by adding chemical modifications like acetyl groups, the charge becomes less positive. Biology for AP Courses 2022-06-09T00:00:00Z This causes a slight positive charge on the hydrogen end of the molecule and a slight negative charge on the oxygen end. Miller & Levine Biology 2018-01-01T00:00:00Z Because an atom in its normal state is electrically neutral, each electron in an atom must be balanced by the same amount of positive charge. Astronomy 2016-10-13T00:00:00Z Similarly, an ion with a double positive charge accelerated through 100 V will be given 200 eV of energy. College Physics for AP Courses 2015-08-12T00:00:00Z This unequal distribution of electrons is known as a polar covalent bond, characterized by a partial positive charge on one atom and a partial negative charge on the other. Chemistry 2019-02-14T00:00:00Z When polar covalent bonds containing hydrogen form, the hydrogen in that bond has a slightly positive charge because hydrogen’s electron is pulled more strongly toward the other element and away from the hydrogen. Biology for AP Courses 2022-06-09T00:00:00Z The attraction between a hydrogen atom with a partial positive charge and an atom with a partial negative charge in another molecule creates a hydrogen bond. Miller & Levine Biology 2018-01-01T00:00:00Z There is no overall charge to a water molecule, but there is a slight positive charge on each hydrogen atom and a slight negative charge on the oxygen atom. Environmental Biology 2018-09-06T00:00:00Z Electric field lines radiate out from a positive charge and terminate on negative charges. College Physics for AP Courses 2015-08-12T00:00:00Z Thus, in an HCl molecule, the chlorine atom carries a partial negative charge and the hydrogen atom has a partial positive charge. Chemistry 2019-02-14T00:00:00Z The negatively charged chloride ion is surrounded by the partially positive charge of the hydrogen on the water molecule. Biology for AP Courses 2022-06-09T00:00:00Z Since negative and positive charges attract, sodium and chlorine ions stick together, creating an ionic bond. Physical Geology 2015-01-01T00:00:00Z Calcium as an ion has a positive charge of plus two. An Introduction to Geology 2017-01-01T00:00:00Z Each electric field line starts on an individual positive charge and ends on a negative one, so that there will be more field lines if there is more charge. College Physics for AP Courses 2015-08-12T00:00:00Z For cations, subtract one electron for each positive charge. Chemistry 2019-02-14T00:00:00Z The sodium-potassium pump expels three ions K+ for every two Na+ inside the cells, creating a net positive charge outside the cell and a net negative charge inside the cell. Biology for AP Courses 2022-06-09T00:00:00Z The negative charge of one electron balances the positive charge of one proton. Physical Geology 2015-01-01T00:00:00Z A simple model of the atom has a central nucleus composed of protons, which have positive charges, and neutrons which have no charge. An Introduction to Geology 2017-01-01T00:00:00Z Figure 19.20 Electric field lines in this parallel plate capacitor, as always, start on positive charges and end on negative charges. College Physics for AP Courses 2015-08-12T00:00:00Z Consequently, H atoms in a water molecule exhibit partial positive charges compared to H atoms in elemental hydrogen. Chemistry 2019-02-14T00:00:00Z Water is a polar molecule, with the hydrogen atoms acquiring a partial positive charge and the oxygen a partial negative charge. Biology for AP Courses 2022-06-09T00:00:00Z As K+ starts to leave the cell, taking a positive charge with it, the membrane potential begins to move back toward its resting voltage. Anatomy and Physiology 2013-06-19T00:00:00Z A cloud of negatively charged electrons surrounds the nucleus, the number of electrons equaling the number of protons thus balancing the positive charge of the protons for a neutral atom. An Introduction to Geology 2017-01-01T00:00:00Z Water, for example, is a polar molecule because one end of the molecule has a slight positive charge and the other end has a slight negative charge. College Physics for AP Courses 2015-08-12T00:00:00Z Remember electrons are negatively charged, so ions with a positive charge have lost an electron. Chemistry 2019-02-14T00:00:00Z While there is no net charge to a water molecule, the polarity of water creates a slightly positive charge on hydrogen and a slightly negative charge on oxygen, contributing to water’s properties of attraction. Biology for AP Courses 2022-06-09T00:00:00Z Protons, with their positive charge, are designated p+. Anatomy and Physiology 2013-06-19T00:00:00Z Introducing electrons into the reactor neutralizes the positive charge and allows for a greater number of ions to enter the space, and packing more ions into that small space exponentially increases the chances for fusion. 2 Seattle startups racing to transform next-gen space travel 2022-06-26T04:00:00Z The direction of conventional current is taken as the direction in which positive charge moves. College Physics for AP Courses 2015-08-12T00:00:00Z This beam was deflected toward the positive charge and away from the negative charge, and was produced in the same way with identical properties when different metals were used for the electrodes. Chemistry 2019-02-14T00:00:00Z In H2 O , the hydrogen atoms acquire a partial negative charge, and the oxygen atom acquires a partial positive charge. Biology for AP Courses 2022-06-09T00:00:00Z Because every proton exerts an identical positive charge, a nucleus that contains eight protons exerts a charge eight times greater than a nucleus that contains one proton. Anatomy and Physiology 2013-06-19T00:00:00Z Free calcium ions have a positive charge that attracts the negatively charged clay particles, encouraging aggregation. How to make the best of clay soil in the garden 2022-02-15T05:00:00Z The force on a negative charge is in exactly the opposite direction to that on a positive charge. College Physics for AP Courses 2015-08-12T00:00:00Z Since like charges repel one another, the few positively charged α particles that changed paths abruptly must have hit, or closely approached, another body that also had a highly concentrated, positive charge. Chemistry 2019-02-14T00:00:00Z In HCl , the hydrogen atom acquires a partial positive charge, and the chlorine atom acquires a partial negative charge. Biology for AP Courses 2022-06-09T00:00:00Z Figure 2.11 Hydrogen Bonds between Water Molecules Notice that the bonds occur between the weakly positive charge on the hydrogen atoms and the weakly negative charge on the oxygen atoms. Anatomy and Physiology 2013-06-19T00:00:00Z The big breakthrough came when he and his team figured out how to manipulate the positive charge on the fatty coats, said Thomas Madden, who worked with Dr. Cullis at Inex. Halting Progress and Happy Accidents: How mRNA Vaccines Were Made 2022-01-15T05:00:00Z Moving electrons feel a magnetic force toward one side of the conductor, leaving a net positive charge on the other side. College Physics for AP Courses 2015-08-12T00:00:00Z In every ionic compound, the total number of positive charges of the cations equals the total number of negative charges of the anions. Chemistry 2019-02-14T00:00:00Z Hydrogen is more electronegative than oxygen, generating a partial positive charge near the hydrogen atom. Biology for AP Courses 2022-06-09T00:00:00Z As the Na+ moves, or flows, a short distance along the cell membrane, its positive charge depolarizes a little more of the cell membrane. Anatomy and Physiology 2013-06-19T00:00:00Z The big breakthrough came when he and his team figured out how to manipulate the positive charge on the fatty coats, said Thomas Madden, who worked with Cullis at Inex, a firm co-founded by Cullis. Halting progress and happy accidents: How mRNA vaccines were made 2022-01-15T05:00:00Z X has negative charge and Y has positive charge. College Physics for AP Courses 2015-08-12T00:00:00Z In the HCl molecule, the more electronegative Cl atom bears the partial negative charge, whereas the less electronegative H atom bears the partial positive charge. Chemistry 2019-02-14T00:00:00Z Scientists dreamed of doing the same with RNA, but that molecule has a negative charge to it, and the lipid couldn't have a permanently positive charge or it would destroy the cell membrane. From cows to COVID: The spooky origins of vaccines 2021-11-14T05:00:00Z Both of these ions have higher concentrations outside the cell than inside; because they have a positive charge, they will move into the cell causing it to become less negative relative to the outside. Anatomy and Physiology 2013-06-19T00:00:00Z Like heparin, DNA is negatively charged, which would help bind it to PF4, which has a positive charge. Hard choices emerge as link between AstraZeneca vaccine and rare clotting disorder becomes clearer 2021-04-11T04:00:00Z When a free positive charge q is accelerated by an electric field, such as shown in Figure 19.2, it is given kinetic energy. College Physics for AP Courses 2015-08-12T00:00:00Z Two aluminum ions, each with a charge of 3+, would give us six positive charges, and three oxide ions, each with a charge of 2−, would give us six negative charges. Chemistry 2019-02-14T00:00:00Z As this negative leader stretches toward the ground, a positive charge from the ground reaches upward toward it with an invisible channel of its own called a streamer. How a Pacific storm fueled lightning that sparked California's biggest-ever fire season 2020-09-09T04:00:00Z If a positive charge moves out of a cell, the cell becomes more negative; if a negative charge enters the cell, the same thing happens. Anatomy and Physiology 2013-06-19T00:00:00Z Inside each of these building blocks, the atoms are arranged in a so-called electric dipole, with more positive charges on one side and more negative charges on the other. Transparent, power-producing crystals could lead to invisible robots, self-powered touch screens 2020-01-15T05:00:00Z Electrons in the molecule are attracted to the oxygen nucleus and leave an excess of positive charge near the two hydrogen nuclei. College Physics for AP Courses 2015-08-12T00:00:00Z As all substances must be electrically neutral, the total number of positive charges on the cations of an ionic compound must equal the total number of negative charges on its anions. Chemistry 2019-02-14T00:00:00Z The stepped leader carries a positive charge, while streamers from the ground are negatively charged. How a Pacific storm fueled lightning that sparked California's biggest-ever fire season 2020-09-09T04:00:00Z The loss will cause the positive charge of potassium’s protons to be more influential than the negative charge of potassium’s electrons. Anatomy and Physiology 2013-06-19T00:00:00Z By pumping the positive ions—like sodium or potassium—to the other side of a semipermeable membrane, researchers can create two pools of water: one with a positive charge, and one with a negative charge. Rivers could generate thousands of nuclear power plants worth of energy, thanks to a new ‘blue’ membrane 2019-12-04T05:00:00Z This results in a layer of positive charge on the outside, a layer of negative charge on the inside, and thus a voltage across the cell membrane. College Physics for AP Courses 2015-08-12T00:00:00Z Thus, each individual colloidal particle bears a positive charge, and the colloidal dispersion consists of charged colloidal particles and some free hydroxide ions, which keep the dispersion electrically neutral. Chemistry 2019-02-14T00:00:00Z Some of the electrons’ energy goes to directing protons, single positive charges, into a holding area to be stored, batterylike, until the plant needs them. Key Photosynthesis Complex Viewed in Spinach 2019-11-13T05:00:00Z It has a region of weakly positive charge and a region of weakly negative charge. Anatomy and Physiology 2013-06-19T00:00:00Z Receptor activation causes ion movement across the cell membrane, which produces depolarization — an increase in positive charge inside the postsynaptic neuron that leads to excitation. Dangerous liaisons as tumour cells form synapses with neurons 2019-09-17T04:00:00Z Depending on the situation, positive charges, negative charges, or both may move. College Physics for AP Courses 2015-08-12T00:00:00Z Most metal hydroxide colloids have positive charges, whereas most metals and metal sulfides form negatively charged dispersions. Chemistry 2019-02-14T00:00:00Z That carried a positive charge a decent distance from the updraft, producing bolts farther away and allowing “anvil crawlers,” which is a particular form of lightning, to ripple along the underside of the high clouds. Analysis | Wicked light show dazzles D.C.’s Virginia suburbs. Here’s how it happened. 2019-08-14T04:00:00Z The voltage whacks electrons off the lithium atoms, leaving them with a positive charge. The Good Kind of Crazy: The Quest for Exotic Propulsion 2019-07-29T04:00:00Z The nicotine in nicotine salts is ionized, which means it carries a slight positive charge. Juul’s nicotine salts are dominating the market — and other companies want in 2018-11-21T05:00:00Z This results in a layer of positive charge on the outside, a layer of negative charge on the inside, and thus a voltage across the cell membrane. College Physics for AP Courses 2015-08-12T00:00:00Z The very high temperature is necessary to give the nuclei enough kinetic energy to overcome the very strong repulsive forces resulting from the positive charges on their nuclei so they can collide. Chemistry 2019-02-14T00:00:00Z They consist of two metal plates, one with a positive charge and one with a negative charge. Supercapacitors power the Note 9 stylus — but are they ready to replace batteries? 2018-08-17T04:00:00Z Under normal circumstances, the interior of a healthy, resting cell carries a negative charge while the area outside the cell membrane carries a positive charge. WVU researchers aim to better understand breast cancer 2018-02-04T05:00:00Z To prevent an escape of new points from the gamut Γ across its boundary, put a negligibly small but positive charge at the boundary’s closest point to xj for every j. Painting New Lines: Maximizing Color Difference in Metro Maps 2018-01-31T05:00:00Z Historically, the Hall effect was used to show that electrons carry current in metals and it also shows that positive charges carry current in some semiconductors. College Physics for AP Courses 2015-08-12T00:00:00Z Interactions with sparticles, however, would deform this sphere in a way that would create a slight positive charge in one place and an equal, negative charge opposite it. Fundamental physics is frustrating physicists 2018-01-11T05:00:00Z The positive charges in the glue are attracted to the surface of biological tissues. Stretchy glue inspired by slugs could be the future of sutures 2017-07-27T04:00:00Z A lithium ion can carry a positive charge in a tiny space. Indigenous people are left poor as tech world takes lithium from under their feet 2016-12-19T05:00:00Z Rubbing a comb or brush against your hair leaves each follicle with a positive charge. How to Get Rid of Static Cling 2016-12-15T05:00:00Z Draw gravitational field lines between 2 masses, electric field lines between a positive and a negative charge, electric field lines between 2 positive charges and magnetic field lines around a magnet. College Physics for AP Courses 2015-08-12T00:00:00Z The gel contains a chemical called edathamil that binds to calcium in plaque, neutralizing the positive charge that causes the bacterial film to adhere to teeth, he adds. Dental Gel Fights Plaque, but Lacks Fluoride 2016-08-01T04:00:00Z The surfaces of bacteria are covered with a variety of molecules with different structures and negative charges that attract the rare earths’ positive charge when in solution. How Acid—and Bacteria—Could Make Recycling Your Phone Greener These “holes” are positive charges that come from molecular defects known as peroxy bonds, which occur in most crystalline rocks and involve two oxygen atoms bonded together instead of to silicon or another element. Can electric signals in Earth’s atmosphere predict earthquakes? 2015-12-21T05:00:00Z The resulting regions of alternating negative and positive charge form waves that accelerate further charged particles. CERN Prepares to Test Revolutionary Mini-Accelerator 2015-10-07T04:00:00Z Also implied is the existence of previously unknown nuclear forces to counteract the huge repulsive Coulomb forces among the positive charges in the nucleus. College Physics for AP Courses 2015-08-12T00:00:00Z They complete the circuit created by the battery-like boat, which emits a positive charge and negative charge from either end. Ohio biologists use ‘shocking’ method to find fishing holes 2015-05-30T04:00:00Z While metallic chromium is perfectly inert and safe, in certain chemical compounds chromium forms ions with a plus-six positive charge. The element that made the 20th Century shine - BBC News 2015-05-22T04:00:00Z This creates a chain reaction of electrons flowing toward the peroxy defect, effectively creating a cloud of positive charge flowing away, potentially to the surface and beyond. Can electric signals in Earth’s atmosphere predict earthquakes? 2015-12-21T05:00:00Z Computerized simulations of this reaction showed the surface of the metal rapidly forms a large positive charge, and this charge repulsion leads to a rapid expansion and disintegration of the surface. Video Shows Why Potassium Explodes Upon Hitting Water Antielectrons are the antimatter counterpart to electrons, being nearly identical, having the same mass, spin, and so on, but having a positive charge and an electron family number of –1 . College Physics for AP Courses 2015-08-12T00:00:00Z Apparently a blossom carries a negative charge, while an insect in flight holds a positive charge. Planting a Clock That Tracks Hours by Flowers 2015-01-28T05:00:00Z A p-type semiconductor is a material rich in positive charge carriers or holes, whereas negative charges make up the opposing n-type semiconductor. Blue LEDs Fail Because of Magnesium Trap 2015-01-28T05:00:00Z This suggests that the reaction is kick-started by positive charges repelling each other. Metal explosions 'driven by charge' 2015-01-26T05:00:00Z The mutual repulsion of those positive charges rips the metal apart, and it blasts outward in tiny needles. Why this popular chemistry experiment is a blast 2015-01-26T05:00:00Z In order for charge to be conserved overall, the nucleus must gain a positive charge, increasing its atomic number by 1, resulting in 241 Cm. College Physics for AP Courses 2015-08-12T00:00:00Z So in its wake, a bubble of a positive charge opens, followed by a knot of negative charge as the plasma’s electrons flow back together. Physicists crank up current in new type of accelerator 2014-11-07T05:00:00Z A positive charge in the microprocessor means “yes” and a negative charge means “no.” How Dwight D. Eisenhower Invented The Internet -- And The Desktop Computer 2014-09-02T04:00:00Z They apply a positive charge to the lance so that the negative-charged DNA sticks. How to Get New Genes Into a Cell 2014-06-26T04:00:00Z Even the great Benjamin Franklin inadvertently established the convention of calling positive charge negative and vice-versa as a result of his experiments with electricity. Why Tau Trumps Pi 2014-06-25T04:00:00Z The two positive charges are seen to be repelled by the photon exchange. College Physics for AP Courses 2015-08-12T00:00:00Z “You shine like a beacon and your positive charge illuminates a map that gravitates us towards the best of all of us. Thank you for being you and keep on keeping on.” Bitcoin Philanthropists Raise $21,000 For Dorian Satoshi Nakamoto 2014-04-01T00:27:00Z When tall objects build up a positive charge underneath a negatively charged storm cloud, they form a cloud of positively charged ions, which helps to dissipate the electric field around them. Wind Turbines Generate "Upside-Down" Lightning [Video] 2014-03-03T21:54:39Z The hole would have all the properties of an electron, but with a positive charge. Schrodinger’s Rats and The Search for Ultimate Reality [Excerpt] 2014-01-31T15:00:00Z Thus, an electron has one negative charge, a proton has one positive charge and a photon, the carrier of light, has zero charge. Is Consciousness Universal? 2014-01-01T05:45:00.400Z Figure 33.4 shows the exchange of a virtual photon between two positive charges. College Physics for AP Courses 2015-08-12T00:00:00Z Ultraviolet light and X-rays on the day side of the Moon could strip negatively charged electrons off atoms in the dust during the day, imparting a positive charge to grains. Moon Mission to Suck Up Lunar Dust 2013-09-03T16:45:00.763Z Lichtenberg noted two types of patterns: one for a positive charge, which had longer, more elaborate branching, and the other for a negative charge, which more closely resembled a shell. Fermilab Physicist Makes "Frozen Lightning" Art with Accelerators 2013-07-23T23:15:00.603Z As expected, most bumblebees were carrying a positive charge. Bumblebees Sense Electric Fields in Flowers 2013-02-21T22:15:04.030Z When light strikes a leaf, it creates a pair of negative and positive charges that travel long distances to reaction centres, where they are used to make energy for the plant. Simulation: Quantum leaps 2012-11-14T18:21:16.017Z Two glass rods rubbed with silk in this manner will repel one another, since each rod has positive charge on it. College Physics for AP Courses 2015-08-12T00:00:00Z The strong electric field at the tip polarizes the pieces, pulling their electrons onto one side and leaving a net positive charge on the other, essentially making small electric dipoles. Cavity Quantum Electrodynamics 2012-10-09T20:45:02.517Z The heated filament emits a steady flow of electrons, which are attracted to the plate's positive charge. Return of the Vacuum Tube 2012-05-23T18:44:29Z They found one called M13 bacteriophage, whose narrow, tube-shaped outer coat consists of about 2700 copies of a rod-shaped protein with positive charges on one end and negative charges on the other. Electronics Go Viral 2012-05-14T21:32:44Z Such a negative charge behind the tinfoil sheet is called an electric image of the positive charge in front. Lord Kelvin An account of his scientific life and work 2012-04-06T02:00:32.097Z Normal macroscopic amounts of matter contain immense numbers of atoms and molecules and, hence, even greater numbers of individual negative and positive charges. College Physics for AP Courses 2015-08-12T00:00:00Z Graphene transistors can multitask because as the voltage varies, they reach a minimum current and then switch back and forth between carrying negative and positive charges. Electronics: Back to analogue 2012-03-14T22:50:44.580Z Each neutron is made of charged quarks: two down quarks that each carry a negative charge one-third as strong as an electron's; and an up quark that carries a two-thirds positive charge. Efforts to Measure Neutron's Charge Are Plagued by Difficulties 2012-02-01T15:45:10.403Z Let a very small positive charge be given to A, B remaining uncharged. Heroes of Science: Physicists 2012-01-17T03:00:17Z Armstrong found that the limit of amplification had been reached when the negative charge in the tube approaches the positive charge. The Radio Boys at Mountain Pass The Midnight Call for Assistance 2012-01-02T03:00:17.697Z Figure 18.6 When this person touches a Van de Graaff generator, she receives an excess of positive charge, causing her hair to stand on end. College Physics for AP Courses 2015-08-12T00:00:00Z The attracted positive charge will, however remain being bound as it were by its attraction towards the negative charge on the cake. Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications 2011-12-24T03:07:54.823Z An excess of one of these produces a positive charge, an excess of the other a negative charge. The Story of Great Inventions 2011-10-05T02:00:16.353Z The ball will become negatively electrified, because the small positive charge in A will attract negative electricity from the earth into the ball. Heroes of Science: Physicists 2012-01-17T03:00:17Z When a constant voltage is applied between the two electrodes, one electrode holds positive charges, the other negative. Power Walk, Gain a Watt 2011-08-23T22:18:56Z An artist's conception of an electron and a proton illustrate the particles carrying the negative and positive charges. College Physics for AP Courses 2015-08-12T00:00:00Z In the position v the remainder of the positive charge on l passes over to L′. Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications 2011-12-24T03:07:54.823Z Left: A gold leaf electroscope, with a positive charge induced in the gold leaf. Paris: City of Light and Cosmic Rays 2011-07-04T14:15:00.943Z On June 6, however, he obtained a positive charge from a cloud. Heroes of Science: Physicists 2012-01-17T03:00:17Z If the electricity of the body be negative, it will tend to neutralize the positive charge; and the needle will be less deflected. A Treatise on Meteorological Instruments Explanatory of Their Scientific Principles, Method of Construction, and Practical Utility 2011-06-19T02:00:15.717Z Figure 18.28 The Coulomb force field due to a positive charge Q is shown acting on two different charges. College Physics for AP Courses 2015-08-12T00:00:00Z When l reaches the position u, a part of its now strong positive charge passes to CD, thus increasing the positive charge upon this inductor. Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications 2011-12-24T03:07:54.823Z When a positively-charged friction rod is brought near the device, the negative charge in the gold leaf is drawn towards it, leaving the leaves with a net positive charge. Paris: City of Light and Cosmic Rays 2011-07-04T14:15:00.943Z By a process called 'induction' the positive charge in the cloud draws an excess of negative electricity to the surface of the ground underneath. The Mentor: The Weather Serial Number 110; 1 July, 1916 2011-06-09T02:00:19.213Z The potential at a point is then numerically equal to the work done in carrying a unit positive charge from earth to the point. The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura 2011-04-14T02:00:56.200Z It is very similar to the field produced by two positive charges, except that the directions are reversed. College Physics for AP Courses 2015-08-12T00:00:00Z Continuing their rotation, the positively charged carrier gave up its positive charge by touching a little knob attached to the positive field plate, and similarly for the negative charge carrier. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z Touching the friction rod to the electroscope draws away all the negative charge and leaves the scope with a net positive charge. Paris: City of Light and Cosmic Rays 2011-07-04T14:15:00.943Z But because it is more massive than an electron, the negative muon orbits the nucleus much more closely, masking the positive charge of one of the protons. Artificial Hydrogen Tests Quantum Theory 2011-01-28T01:45:01.977Z The nearest approach to a positive electron is the nucleus of the hydrogen atom, which carries a positive charge of the same magnitude as the charge on an electron. The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura 2011-04-14T02:00:56.200Z The vast majority of positive charge in nature is carried by protons, while the vast majority of negative charge is carried by electrons. College Physics for AP Courses 2015-08-12T00:00:00Z Likewise the negative charge on B induces a positive charge on the side of B′ nearest to it and repels negative electricity to the far side. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z The research team suspects that the polymer’s positive charge and stiffness induce the clotting. New Gel Seals Wounds Fast 2010-08-25T15:17:00Z According to this hypothesis, the electric current is carried by the ions, the positive charges by the cations, and the negative charges by the anions. The Mechanism of Life The direction of the electric field at any point is defined to be the direction of the mechanical force acting on a unit positive charge placed at that point. The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura 2011-04-14T02:00:56.200Z The number of field lines leaving a positive charge or entering a negative charge is proportional to the magnitude of the charge. College Physics for AP Courses 2015-08-12T00:00:00Z The liquid thus acquires a positive charge, and the metal a negative charge. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z An alpha particle is the nucleus of a helium atom and is made up of two protons and two neutrons; it carries two positive charges. LRL Accelerators The 184-Inch Synchrocyclotron The ions carrying a positive charge are attracted to plate B, while those negatively charged are attracted to plate A, thus causing a current. A Brief Account of Radio-activity If the force on the positive ion is from A to B, the plate B will receive a positive charge of electricity. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8 "Conduction, Electric" Figure 18.6 shows a person touching a Van de Graaff generator and receiving excess positive charge. College Physics for AP Courses 2015-08-12T00:00:00Z Lodge considered the simple case of a negatively charged electron revolving round an atom of mass relatively large but having an equal positive charge and held in equilibrium by electrical forces. A History of Science, Volume 5(of 5) Aspects Of Recent Science But if there are fewer electrons than usual in an object, we say that it has a positive charge of electricity on it, or that it is positively charged. Common Science There can thus be no doubt that the alpha particle becomes a helium atom when its positive charge is neutralized. A Brief Account of Radio-activity The magnitude of this positive charge may be very much increased by directing a blast of air on the plate. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8 "Conduction, Electric" There, some are transferred to the positive rod by touch, leaving the electroscope with a net positive charge. College Physics for AP Courses 2015-08-12T00:00:00Z Ergo, a heavy negative charge in the air, which will absorb rather than discharge a positive charge, should tend to prevent rain from falling. The Great Drought A positive charge means that fewer electrons are present than usual. Common Science It leaves a positive charge that is tremendous if it isn't neutralized. The Hammer of Thor Some of these particles in their journey through the gas attract a corpuscle whose negative charge neutralizes the positive charge on the particle. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8 "Conduction, Electric" The field lines end on excess negative charge on one section of the surface and begin again on excess positive charge on the opposite side. College Physics for AP Courses 2015-08-12T00:00:00Z The affidavit in the warrant did not even go so far as this, in any positive charge. The Trial of Reuben Crandall, M.D. Charged with Publishing and Circulating Seditious and Incendiary Papers, &c. in the District of Columbia, with the Intent of Exciting Servile Insurrection. Carefully Reported, and Compiled from the Written Statements of the Court and the Counsel. To plate No. 1 he imparted a positive charge, and with it he induced a negative charge in plate No. 2. Scientific American Supplement, No. 647, May 26, 1888 They located the negative charges on one ship and the positive charges on the one next to it. Islands of Space If u denotes the average velocity of the potassium ion, the positive charge carried per second across unit area normal to the flow is n e u. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8 "Conduction, Electric" In dark areas, the positive charge remains, and so the image has been transferred to the drum. College Physics for AP Courses 2015-08-12T00:00:00Z The arrangement and number of electrons, as well as positive charges, are entirely different from what I had supposed. The Skylark of Space Then with plate No. 2 he induced a positive charge in plate No. 3. Scientific American Supplement, No. 647, May 26, 1888 On coming into contact with the cathode, the Na+ ions give up their positive charge and are then ordinary sodium atoms. An Elementary Study of Chemistry By observing the time when the increase in the rate of diminution of the positive charge with the time suddenly sets in we can determine T1, and hence the velocity of the negative ions. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8 "Conduction, Electric" Since the drop has a positive charge and the electric field is given to be upward, the electric force is upward. College Physics for AP Courses 2015-08-12T00:00:00Z A positively-electrified body is now one whose atoms have lost some of their outlying electrons, so that the positive charge of electricity predominates. The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told "Get up!" snarled Miles at Tom, quickly flipping the ray gun back to positive charge. Treachery in Outer Space Here the positive charge on the two sodium ions equals the double negative charge on the SO4 ion. An Elementary Study of Chemistry If it is not charged to start with, the electrons will still be liberated at the surface of the body, and this will acquire a positive charge. The Birth-Time of the World and Other Scientific Essays How many coulombs of positive charge are there in 4.00 kg of plutonium, given its atomic mass is 244 and that each plutonium atom has 94 protons? College Physics for AP Courses 2015-08-12T00:00:00Z Thus, in the simple cell under consideration the sulphuric acid, by dissociation, splits up into hydrogen ions bearing positive charges, and SO4 ions bearing negative charges. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. In the one case the atoms are electrified, and carry a relatively considerable positive charge, inseparable from their state as ions, while in the other they are in the neutral state. The New Physics and Its Evolution One kind is charged with positive electricity and the other with negative electricity; moreover the sum of all the positive charges is always equal to the sum of all the negative charges. An Elementary Study of Chemistry The alpha ray carries a positive charge of double the ionic amount. The Birth-Time of the World and Other Scientific Essays X has positive charge and Y has negative charge. College Physics for AP Courses 2015-08-12T00:00:00Z The carrying away of positive charges from a hitherto neutral body leaves that body with a negative charge. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. "A positive charge of fraud is advanced by a man at the head of his profession against a work which we have published—and you say, Never mind the letter." Blind Love This can be done by giving the latter piece of metal a positive charge. The Radio Amateur's Hand Book The ionised sodium atom is known to be _monad_ or carries but _one_ positive charge; whereas the magnesium atom is _diad_ and carries _two_ positive charges. The Birth-Time of the World and Other Scientific Essays For example, work W done to accelerate a positive charge from rest is positive and results from a loss in PE, or a negative ΔPE . College Physics for AP Courses 2015-08-12T00:00:00Z The positive charges, leaving the zinc, or consumed, plate, and passing through the electrolyte to the copper, or unconsumed, plate, constitute in effect a current of electricity flowing within the electrolyte. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. The positive charge appears to be equally gratuitous. Darwiniana; Essays and Reviews Pertaining to Darwinism In the main, therefore, the negative charge of the resin is free to induce an opposite or positive charge on the lower surface and a negative charge on the upper surface of the plate. The Story of Electricity I do not wish you to break with an old friend while we know of no positive charge against her, though I should think there could be little to attract you. Heartsease, Or, the Brother's Wife Figure 19.33 The electric field near two equal positive charges is directed away from each of the charges. College Physics for AP Courses 2015-08-12T00:00:00Z The fact that conventional current is taken to be in the direction that positive charge would flow can be traced back to American politician and scientist Benjamin Franklin in the 1700s. College Physics for AP Courses 2015-08-12T00:00:00Z The nucleus has a positive charge Zqe ; thus, V = kZqe / rn , recalling an earlier equation for the potential due to a point charge. College Physics for AP Courses 2015-08-12T00:00:00Z When the charged plate or conductor of the electrophorus touches the knob the inner foil takes a positive charge, which induces a negative charge in the outer foil through the glass. The Story of Electricity Since the attractive nuclear force that can fuse nuclei together is short ranged, the repulsion of like positive charges must be overcome to get nuclei close enough to induce fusion. College Physics for AP Courses 2015-08-12T00:00:00Z The direction of conventional current is the direction that positive charge would flow. College Physics for AP Courses 2015-08-12T00:00:00Z Figure 33.5 The Feynman diagram for the exchange of a virtual photon between two positive charges illustrates how the electromagnetic force is transmitted on a quantum mechanical scale. College Physics for AP Courses 2015-08-12T00:00:00Z Figure 33.5 shows a way of graphing the exchange of a virtual photon between two positive charges. College Physics for AP Courses 2015-08-12T00:00:00Z The corresponding positive charge induced at the same time escapes through the hand to the ground or "earth." The Story of Electricity Why, for example, should the particle that carries positive charge be almost 2000 times as massive as the one carrying negative charge? College Physics for AP Courses 2015-08-12T00:00:00Z A Van de Graaff generator used for nuclear research can produce a current of pure positive charges, such as protons. College Physics for AP Courses 2015-08-12T00:00:00Z One of them is the D+ meson, which has a single positive charge and a baryon number of zero, also the value of its strangeness, topness, and bottomness. College Physics for AP Courses 2015-08-12T00:00:00Z What is the direction of the magnetic field that produces the magnetic force on a positive charge as shown in each of the three cases in the figure below, assuming B is perpendicular to v ? College Physics for AP Courses 2015-08-12T00:00:00Z |
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