0 Kelvin?
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My physics teacher told me a month ago, that -273.15 degrees celcius was absolute zero. But when I asked him why it exists he said that my question was out of topic.
- Why does absolute zero exist?
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http//en.wikipedia.org/wiki/Kelvin
Why can't we lower the temperature below zero K?
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It is simply that 0 Kelvin is the absence of all heat. So nothing can get colder.
exactly, 'cold' = absence of heat
when heat gets to '0', the temperature is 0 K as all molecular motion stops.
You can't get a slower molecular speed of vibration/movement than 0 -
exactly, 'cold' = absence of heat
when heat gets to '0', the temperature is 0 K as all molecular motion stops.
You can't get a slower molecular speed of vibration/movement than 0Just the same as dark = absence of light
Position = absence of volocity
etc
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well, position and velocity are a little complicated, since you have to fix a frame of reference,
you could sit still in a train going at 60km/hThat is true, it is all relative. Also both position and velocity do exist and can be measured just not at the same time. Whereas dark and cold do not
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That is true, it is all relative. Also both position and velocity do exist and can be measured just not at the same time. Whereas dark and cold do not
exactly, temperature, light intensity are both scalars, whereas velocity is a vector, hence the need for a frame of reference
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It is simply that 0 Kelvin is the absence of all heat. So nothing can get colder.
Thanks.