| 单词 | reference frame |
| 例句 | Perhaps tomorrow someone will invent a theory consistent with everything else we know that circumvents paradoxes on such matters as simultaneity, avoids privileged reference frames and still permits travel faster than light. Cosmos 1980-01-01T00:00:00Z However, the notion of continental groupings as a meaningful reference frame for understanding human biological variation persisted. A Field at a Crossroads: Genetics and Racial Mythmaking 2022-12-22T05:00:00Z All forces share certain common characteristics when considered by observers in inertial reference frames. College Physics for AP Courses 2015-08-12T00:00:00Z Without a substance, it could be objected that the qualities are merely unintelligible and unrelated qualities without a reference frame. Introduction to Philosophy 2022-06-15T00:00:00Z For decades, radio astronomers have tracked minute changes in Earth’s surface rotation—the length of a day—against a cosmic reference frame: the fixed position of distant cosmic beacons called quasars. Scientists are probing the secrets of Earth’s inner core—and how it saved life on our planet 2022-03-30T04:00:00Z This was achieved by Gaia tracing its movement against the stars, using the "fixed" points of light from very far-away galaxies as a reference frame. Gaia 'discovery machine' updates star catalogue 2020-12-03T05:00:00Z Today, the radio measurements feed into a global bureaucracy that maintains reference frames, imposing order on space in the same way astronomical observatories used to keep time. Precise maps of millions of bright quasars show our place in the cosmos as never before 2020-11-24T05:00:00Z An observer in a particular reference frame can describe the motion of an object using such quantities as position, displacement, distance, velocity, speed, and acceleration. College Physics for AP Courses 2015-08-12T00:00:00Z It said: "They are much more than a convenient geographical reference frame. They are fundamental to our notion of what our country is and of our own place within it." Is Rutland really England's smallest county? 2020-01-24T05:00:00Z “European languages, which have an egocentric reference frame, may now be blocking our ability to use our brains in this way,” he added. The sixth sense: can humans detect the Earth’s magnetic field? 2019-04-06T04:00:00Z This network of quasars provides a celestial reference frame to better situate our solar system and the Milky Way within the cosmic landscape. The Milky Way, Revealed as Never Before 2018-04-25T04:00:00Z “Ninety-eight percent of that work was obliterated after the Gaia release,” says Leonid Petrov, an astronomer at NASA’s Goddard Space Flight Center who conducts radio quasar observations to build reference frames. Precise maps of millions of bright quasars show our place in the cosmos as never before 2020-11-24T05:00:00Z In other cases, we use reference frames that are not stationary but are in motion relative to the Earth. College Physics for AP Courses 2015-08-12T00:00:00Z It will be the reference frame used to plan all observations by other telescopes. 'Book of the heavens' takes shape 2018-04-25T04:00:00Z Readers might hope that Dyson’s own pattern — the reference frame in which his remarkable range becomes a coherent whole — would be found in his letters. Freeman Dyson’s life of scientific delight 2018-03-26T04:00:00Z Other essential tools include space-time, in which the reference frame includes time as well as space; proper time; and four-vectors, special kinds of paths and objects in space-time. Relativity: Final ascent of physics : Nature : Nature Research 2017-09-19T04:00:00Z It was the basis of a brand-new celestial reference frame, a fixed, imaginary grid against which everything else moves, akin to lines of latitude and longitude on Earth. Precise maps of millions of bright quasars show our place in the cosmos as never before 2020-11-24T05:00:00Z To describe the position of a person in an airplane, for example, we use the airplane, not the Earth, as the reference frame. College Physics for AP Courses 2015-08-12T00:00:00Z The second way in which Iran-Contra is a more useful reference frame is the matter of scope. Trump’s Russia scandal is more like Iran-Contra than Watergate — which isn’t good news 2017-06-04T04:00:00Z Strengthening the spectrally selective impact of the absorber on the incident -photon in the vibrating reference frame leads to deeper modulation of the output photon in the laboratory frame of reference. Coherent control of the waveforms of recoilless γ-ray photons 2014-04-04T22:51:57.673Z The path starts with the first lecture, a discussion of reference frames. Relativity: Final ascent of physics : Nature : Nature Research 2017-09-19T04:00:00Z These radio beacons not only guide the pointing of telescopes, but they are also the bedrock of the reference frame for the spinning, bucking Earth. Precise maps of millions of bright quasars show our place in the cosmos as never before 2020-11-24T05:00:00Z An observer in a particular reference frame can describe the motion of an object using such quantities as position, displacement, distance, velocity, speed, and acceleration. College Physics for AP Courses 2015-08-12T00:00:00Z For multiple reasons, we’d be much better served to use Ronald Reagan’s Iran-Contra scandal as our primary reference frame, and use Watergate only as a supplement. Trump’s Russia scandal is more like Iran-Contra than Watergate — which isn’t good news 2017-06-04T04:00:00Z Well Einstein showed that space and time aren’t real– they change from one reference frame to another. Is It Solipsistic in Here, or Is It Just Me? 2014-03-12T17:22:25Z My father had taught me that to keep accelerated and inertial reference frames on equal footing—to turn a curve into a line—you have to bend the paper. Schrodinger’s Rats and The Search for Ultimate Reality [Excerpt] 2014-01-31T15:00:00Z Next week, on 3 December, Gaia will release, along with the latest data about billions of Milky Way stars, its newest reference frame, built from 1.6 million quasars scattered across the sky. Precise maps of millions of bright quasars show our place in the cosmos as never before 2020-11-24T05:00:00Z Relative velocity is the velocity of an object as observed from a particular reference frame, and it varies dramatically with reference frame. College Physics for AP Courses 2015-08-12T00:00:00Z "The instruments included a metal reference frame and brace used in surgical navigation during the procedure," she said. Thirteen New England patients possibly exposed to fatal brain disease 2013-09-06T01:04:11Z And that puts me in the rather uncomfortable position of having to deny the existence of another reference frame – namely, “reader.” Is It Solipsistic in Here, or Is It Just Me? 2014-03-12T17:22:25Z His first velocity results were close to zero, so he changed his reference frame, and found that the velocities were a little higher when he computed over more space. The speed of dark energy 2013-08-28T17:21:00.513Z “It is improved, larger, better, more beautiful,” says François Mignard, an astronomer at the Côte d’Azur Observatory in France who leads Gaia’s reference frame team. Precise maps of millions of bright quasars show our place in the cosmos as never before 2020-11-24T05:00:00Z All forces share certain common characteristics when considered by observers in inertial reference frames. College Physics for AP Courses 2015-08-12T00:00:00Z The four reference frames used to highlight this technique look like this: In other words, the technology to measure heart rate is entirely optical and not based on physical contact with the controller. Microsoft's New 'Xbox One' Can Measure Heart Rate 2013-05-21T22:26:06Z That is, something is real if it remains unchanged from one reference frame to the next. Is It Solipsistic in Here, or Is It Just Me? 2014-03-12T17:22:25Z The lightcone represents the mathematics of Minkowski metric and tensor algebra, as well as that of the Lorentzian transformation, which is the transformation between two reference frames moving relative to each other at constant velocity. The Science and Art of the Diagrams: Culturing Physics and Mathematics, Part 1 2013-03-22T12:45:00.207Z The Gaia reference frame is only the latest solution to a very, very old problem. Precise maps of millions of bright quasars show our place in the cosmos as never before 2020-11-24T05:00:00Z Since both lamps are the same distance from her in her reference frame, from her perspective, the right flash occurred before the left flash. College Physics for AP Courses 2015-08-12T00:00:00Z “These findings also present an important reference frame for the Curiosity rover as it searches for reduced organics in the minerals exposed in the bedrock of Gale Crater.” Meteorite Shows Evidence Of Water On Ancient Mars 2013-01-06T14:34:21Z You’ll see one in the sky if you’re in just the right reference frame with the Sun shining in from behind you, and droplets of water in the atmosphere refracting the light. Is It Solipsistic in Here, or Is It Just Me? 2014-03-12T17:22:25Z It shifted by a thousand meters or more between Earth’s reference frame and that of Jupiter’s, according to Klioner. 'Astronomical Unit,' or Earth-Sun Distance, Gets an Overhaul 2012-09-14T21:15:02.757Z Which is to say: it is shorter than the distance measured in the reference frame on the ground. Netherland Scientist Claims Solution to the FTL Neutrino Problem 2011-10-14T13:04:48Z All forces share certain common characteristics when considered by observers in inertial reference frames. College Physics for AP Courses 2015-08-12T00:00:00Z Cosmologists regard the microwave background -- a flash of light emitted 380,000 years after the universe formed -- as the ultimate cosmic reference frame. Mysterious Cosmic 'Dark Flow' Tracked Deeper Into Universe 2010-03-12T15:34:00Z At the proper instant I shifted again, to the reference frame of this Galaxy itself. Upstarts In our reference frame, the vessel had put on an incredible velocity, and covered the nine-hundred-odd light-years around Rigel in six months. Out Around Rigel Clouds and other objects are also contracted along the direction of motion in the muon’s reference frame. College Physics for AP Courses 2015-08-12T00:00:00Z All forces share certain common characteristics when considered by observers in inertial reference frames. College Physics for AP Courses 2015-08-12T00:00:00Z Additionally, this unit will explore the topic of reference frames, a critical component to quantifying how things move. College Physics for AP Courses 2015-08-12T00:00:00Z We were enormously lucky to have learned how to control spatial reference frames ourselves. Upstarts The effect that the chosen reference frame has on your observations is substantial, and an understanding of this is needed to grasp both Enduring Understanding 3.A and Essential Knowledge 3.A.1. College Physics for AP Courses 2015-08-12T00:00:00Z More precisely, you need to specify its position relative to a convenient reference frame. College Physics for AP Courses 2015-08-12T00:00:00Z All forces share certain common characteristics when considered by observers in inertial reference frames. College Physics for AP Courses 2015-08-12T00:00:00Z Earth is often used as a reference frame, and we often describe the position of an object as it relates to stationary objects in that reference frame. College Physics for AP Courses 2015-08-12T00:00:00Z To get the direction of the resultant, measure the angle it makes with the reference frame using a protractor. College Physics for AP Courses 2015-08-12T00:00:00Z An inertial reference frame is any reference frame that is not itself accelerating. College Physics for AP Courses 2015-08-12T00:00:00Z A car traveling at constant velocity is an inertial reference frame. College Physics for AP Courses 2015-08-12T00:00:00Z All forces share certain common characteristics when considered by observers in inertial reference frames. College Physics for AP Courses 2015-08-12T00:00:00Z A car slowing down for a stoplight, or speeding up after the light turns green, will be accelerating and is not an inertial reference frame. College Physics for AP Courses 2015-08-12T00:00:00Z Finally, when the car goes around a turn, which is due to an acceleration changing the direction of the velocity vector, it is not an inertial reference frame. College Physics for AP Courses 2015-08-12T00:00:00Z Note that Newton’s laws of motion are only valid for inertial reference frames. College Physics for AP Courses 2015-08-12T00:00:00Z All forces share certain common characteristics when considered by observers in inertial reference frames. College Physics for AP Courses 2015-08-12T00:00:00Z An observer in a particular reference frame can describe the motion of an object using such quantities as position, displacement, distance, velocity, speed, and acceleration. College Physics for AP Courses 2015-08-12T00:00:00Z An observer in a particular reference frame can describe the motion of an object using such quantities as position, displacement, distance, velocity, speed, and acceleration. College Physics for AP Courses 2015-08-12T00:00:00Z |
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