How can something with an acceleration approaching 0 not behave relativistically? This is not correct. 0 1. wjllope. In the presence of extreme gravity or traveling at near-light velocities, objects experience time dilation. Just because something stops doesn't mean that time stops too. My question may have been unclear, or just stupid and irrelevant, but maybe it makes a good thought experiment (is that the right word/phrase?) Some people have created temperatures very close to absolute zero: the record temperature was 100 pK (one hundred picokelvin, equal to 10−10 kelvin) above absolute zero. Therefore, a particle cannot be completely stopped because then its exact position and momentum would be known.  Even getting close to absolute zero is difficult because anything that touches an object being cooled near absolute zero would give heat to the objects. edit - forgot to directly answer the question! The quick answer to your question is no, molecules do not stop moving at absolute zero. The reason isn't due to the movement of the Earth but because it requires an infinite amount of work to be done on the system in order to remove all the heat from the material you are going to cool, which is impossible. Still have questions? Absolute zero, temperature at which a thermodynamic system has the lowest energy. Brief aside, is it impossible to bring particles to absolute zero on Earth because of the constant acceleration of Earth about around the Sun and the Solar System about the galactic core? For the sake of argument let's say that it takes exactly 1 second. The temperature cannot go down any further. Or perhaps time becomes infinite. Staff Emeritus. In my understanding of it, the closer an object is to a black hole or the faster it's accelerating the slower time moves. So absolute zero is effectively the same as room temperature. So, an engine cannot be 100% efficient, but you can make its efficiency closer to 100% by making the inside temperature hotter and/or the outside temperature colder. So the time dilation factor is 1.0000000000160778. This is not correct. By definition, motion stops at absolute zero because there is no kinetic energy. By definition, motion stops at absolute zero because there is no kinetic energy. Hope that made some sort of sense, honestly I cannot back up this theory, but it is an educated logical guess. Also, the particles cannot move in "reverse" either because as the movement of particles is vibration, vibrating in reverse would be nothing but simply vibrating again. I think Stephen Hawking gives a good example of this in Brief History of Time which is definitely worth a read if you are interested in this kind of stuff. Or perhaps time becomes infinite. If we start to cool the lab down to near absolute zero, we still measure the passage of time the same because the speed of light is NOT temperature dependent. Light can be used to measure time too. In the presence of extreme gravity or traveling at near-light velocities, objects experience time dilation. In other words, zero motion exists at 0K, but that does not imply that time does not exist. Science Advisor. This is due to Heisenberg's uncertainty principle, which states that the more that is known about a particle's position, the less that can be known about its momentum, and vice versa. Join Yahoo Answers and get 100 points today. Likes cnh1995. The Third Law of Thermodynamics says that nothing can ever have a temperature of absolute zero. In quantum physics there is something called zero point energy, which means that even after all the energy from particles has been removed, the particles still have some energy. It is for this reason that you don't get time dilation when you cool things down. One might be able to build a nuclear decay clock. Is light affected by temperature. Absolute zero does not mean zero energy in the ground state. You can sign in to vote the answer. Cooling an object to absolute zero removes all Brownian motion, thereby removing all kinetic energy. Press J to jump to the feed. Absolute zero is the temperature at which the particles of matter (molecules and atoms) are at their lowest energy points. Bear this thought experiment in mind and read through this particularly the section on light clocks being slowed by motion, which will help to explain time dilation in a bit more of an intuitive way (and I think this is the same one in Brief History of Time too). Lv 7. A crystal oscillator (quartz clock) would surly essentially stop at absolute zero. All that the equation says is when u and a are zero then t can be anything and s will still be 0. Ask a science question, get a science answer. what is centripetal vs centrifugal in terms of circular motion? PS- I have a good understanding of calculus, if that aids your explanation. A pendulum clock might still run, as long as all the bearings were free. Regarding absolute zero, it is impossible to cool an object that low but we can get pretty close. Peter, Someplace, World I've heard that at absolute zero … I'm also having trouble wording this properly. Does this imply that time does not exist at 0degK? This will increase the half life (as measured in the lab) by two seconds. 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Or does "absolute zero" only mean that movement stops at the molecular level (as opposed to the sub-atomic level)? $\endgroup$ – aidan.plenert.macdonald Oct 19 '18 at 17:11 Cookies help us deliver our Services. Not quite. reported in the Helsinki University of Technology in 2000. In principle the kinetic motion of gasses time dilates the molecules. At room temperature, the average molecule is moving at a speed of 1700 m/s relative to the lab frame of reference. "Unit of thermodynamic temperature (kelvin)", https://simple.wikipedia.org/w/index.php?title=Absolute_zero&oldid=7010979, Creative Commons Attribution/Share-Alike License. The Celsius and Fahrenheit scales are defined so that absolute zero is −273.15 °C or −459.67 °F.. Motion implies time (because motion has speed and s=ut + 0.5at^2) . If it has a cause, it can only be eternal? Scientists use lasers to slow atoms when cooling objects to very low temperatures. Would cooling an object to absolute zero have any affect on the behavior of time in regards to this object? If you are at Absolute Zero, your time has definitely stopped ..!! How would time flow if we stayed absolutely still? . It corresponds to minus 273.15 degrees Celsius and to minus 459.67 degrees Fahrenheit. edit2 - added some extra info to the first paragraph. if light can travel through a pure vacuum couldnt light pass through a 0degK? In the particle-in-a-box thought experiment, the lowest energy state of the particle is still not zero. 1 decade ago. This page was last changed on 29 June 2020, at 15:16. Motion implies time, but lack of motion does not imply lack of time. Do the photons slow? Basically, gasses are moving very slow at room temperature relative to the speed of light, and any time dilation effects are likely too subtle to measure. I noticed you said about speeding up an object to light speed then time for that object would seem to stand still, but again this is impossible due to the infinite amount of work needed to be done. They move much less than at higher temperatures, but they still have small vibrations at absolute zero. Apr 10, 2019 #5 Drakkith. Consider a gas of tritium, or heavy hydrogen, which is radioactive with a half-life of 12.32 years or 4,500 +/- 8 days. In fact, the SI second is currently defined for cesium atoms at absolute zero, so quite the opposite is true: not only does time not stop at absolute zero, it is actually most accurately measured at absolute zero.