does time stop at absolute zero
In other words, zero motion exists at 0K, but that does not imply that time does not exist. At the physically impossible-to-reach temperature of zero kelvin, or minus 459.67 degrees Fahrenheit (minus 273.15 degrees Celsius), atoms would stop moving. A pendulum clock might still run, as long as all the bearings were free. At room temperature, the average molecule is moving at a speed of 1700 m/s relative to the lab frame of reference. The Third Law of Thermodynamics says that nothing can ever have a temperature of absolute zero. [1] 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. Lv 7. How would time flow if we stayed absolutely still? It's impossible to bring objects to absolute zero because of quantum mechanics, not gravity/acceleration, etc. By definition, motion stops at absolute zero because there is no kinetic energy. In the presence of extreme gravity or traveling at near-light velocities, objects experience time dilation. Would cooling an object to absolute zero have any affect on the behavior of time in regards to this object? The uncertainty on the half-life of tritium is 8 days, so the addition of 2 seconds is impossible to determine with current capabilities. Some people think that at absolute zero particles lose all energy and stop moving. The Second Law of Thermodynamics says that all engines that are powered by heat (like car engines and steam train engines) must release waste heat and can not be 100% efficient. So it makes sense that at absolute zero, time should stop, but at the same time it is also impossible. The temperature cannot go down any further. 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. You can sign in to vote the answer. The Celsius and Fahrenheit scales are defined so that absolute zero is −273.15 °C or −459.67 °F.[3]. However, this effect is too subtle to measure. Motion implies time (because motion has speed and s=ut + 0.5at^2) . From Simple English Wikipedia, the free encyclopedia. edit - forgot to directly answer the question! The Universe cant magic into existence, it has to have a cause. Absolute zero, temperature at which a thermodynamic system has the lowest energy. Absolute zero is the temperature at which the particles of matter (molecules and atoms) are at their lowest energy points. Motion implies time (because motion has speed and s=ut + 0.5at^2) . the third law of thermodynamics proves that a substance cannot be cooled to absolute zero, New comments cannot be posted and votes cannot be cast. 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. I understand that absolute zero and v=c are impossible. Likes cnh1995. "Unit of thermodynamic temperature (kelvin)",, Creative Commons Attribution/Share-Alike License. How can something with an acceleration approaching 0 not behave relativistically? Get your answers by asking now. So the time dilation factor is 1.0000000000160778. This is not correct. Well the perception of time is relative to the observer. In principle the kinetic motion of gasses time dilates the molecules. 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. Atoms aren’t entirely still; they wobble as a result of effects related to quantum physics. Scientists use lasers to slow atoms when cooling objects to very low temperatures. They move much less than at higher temperatures, but they still have small vibrations at absolute zero. 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. what is centripetal vs centrifugal in terms of circular motion? Just because something stops doesn't mean that time stops too. 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. Peter, Someplace, World I've heard that at absolute zero … All molecular motion stops at absolute zero because absolute zero is the coldest possible temperature. Not quite. Regarding absolute zero, it is impossible to cool an object that low but we can get pretty close. Or perhaps time becomes infinite. In my understanding of it, the closer an object is to a black hole or the faster it's accelerating the slower time moves. All that the equation says is when u and a are zero then t can be anything and s will still be 0. 0 1. wjllope. Theoretically, if an object gains enough kinetic energy such that its velocity equals exactly the speed of light it would not travel through time. 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. So absolute zero is effectively the same as room temperature. Still have questions? now, the clocks in the house have stopped and i am stuck in time. While all molecular movement does not cease at absolute zero, no energy from that motion is available for transfer to other systems. 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). By using our Services or clicking I agree, you agree to our use of cookies. However, to directly answer your question temperature does not relate to the passage of time in any way - imagine a thought experiment where we are in a lab at rest, and we build a clock which works by seeing how long it takes a pulse of light to cross the room and back. I'm also having trouble wording this properly. 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. Consider a gas of tritium, or heavy hydrogen, which is radioactive with a half-life of 12.32 years or 4,500 +/- 8 days. Or does "absolute zero" only mean that movement stops at the molecular level (as opposed to the sub-atomic level)? Motion implies time, but lack of motion does not imply lack of time. 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. PS- I have a good understanding of calculus, if that aids your explanation. Is light affected by temperature. 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?) What is the magnitude of the gravitational acceleration on this planet. Absolute zero is the temperature at which the particles of matter (molecules and atoms) are at their lowest energy points.Some people think that at absolute zero particles lose all energy and stop moving. At this stage the pressure of the particles is zero. Press J to jump to the feed. This page was last changed on 29 June 2020, at 15:16. Cooling an object to absolute zero removes all Brownian motion, thereby removing all kinetic energy. Science Advisor. If you are at Absolute Zero, your time has definitely stopped ..!! Ivan is saying that temperatures required to bring nuclear states out of ground state are very very high. In the presence of extreme gravity or traveling at near-light velocities, objects experience time dilation. [2], The kelvin and Rankine temperature scales are defined so that absolute zero is 0 kelvin (K) or 0 degrees Rankine (°R). 1 decade ago. Ask a science question, get a science answer. Do the photons slow? if light can travel through a pure vacuum couldnt light pass through a 0degK? One might be able to build a nuclear decay clock. Press question mark to learn the rest of the keyboard shortcuts. If it has a cause, it can only be eternal? reported in the Helsinki University of Technology in 2000. Does this imply that time does not exist at 0degK? For the sake of argument let's say that it takes exactly 1 second. The closer the temperature of an object gets to absolute zero, the less resistive the material is to electricity therefore it will conduct electricity almost perfectly, with no measurable resistance. This is not correct. The quick answer to your question is no, molecules do not stop moving at absolute zero. Cookies help us deliver our Services. If you get in a spaceship with a clock and travel away from Earth at 99% the speed of light, to you the clock still ticks at the same rate but someone on Earth would see your clock slow down. 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