Linked Questions

35
votes
4answers
6k views

If temperature is amount of kinetic energy of particles, then how can there be a cold breeze? [duplicate]

When we put hands on A/C it gives cold winds. These winds have high kinetic energy but low temperature. How ? *don't confuse with A/C being heat pump , just an example, take antarctic blizzards. I can'...
1
vote
3answers
2k views

Why do we feel cold when we switch on the fan? [duplicate]

We know that on increasing the kinetic energy of a gas its temperature increases: $$\text{Kinetic Energy} = \frac32 kT$$ where $k$ is the Boltzmann constant. This equation is derived from the kinetic ...
0
votes
2answers
505 views

If “Temperature” of a thing is literally it's average kinetic energy then why doesn't a blowing fan increase a gas's “Temperature”? [duplicate]

I have learnt that temperature is literally measure of KE. But I don't see a fan which increase gas's temperature. I was wondering, why?
0
votes
0answers
30 views

Does the temperature of a rapidly moving macroscopic object higher than its stationary state? [duplicate]

I learned that the average kinetic energy has $$ E_k = \frac{3}{2}\ kT. $$ But if heat is in essence molecular motion, then is a rapidly moving ball different with a still one?
1
vote
0answers
28 views

How do moving colliding particles create heat? [duplicate]

I have a question? If moving colliding particles create heat then how come the cold wind is not hot but it has moving particals? Why and how do moving particles create heat? Just curios. Thank You ...
6
votes
2answers
3k views

Why isn't water running faster hotter?

I was running the washing up water this morning, and started to think about why the cold tap isn't hot, and why the water doesn't get hotter the faster it is flowing (if anything, the cold tap gets ...
17
votes
1answer
2k views

Why isn't temperature frame dependent?

In (non-relativistic) classical physics, if the temperature of an object is proportional to the average kinetic energy ${1 \over 2} m\overline {v^{2}}$of its particles (or molecules), then shouldn't ...
2
votes
3answers
11k views

How does temperature relate to the kinetic energy of molecules?

In ideal gas model, temperature is the measure of average kinetic energy of the gas molecules. If by some means the gas particles are accelerated to a very high speed in one direction, KE certainly ...
3
votes
3answers
273 views

If temperature is related to average kinetic energy in an ideal gas, then does speeding up the gas container affect its temperature? [duplicate]

This question is related to the following textbook question: The temperature of an ideal gas is directly proportional to the average kinetic energy of its molecules. If a container of ideal gas is ...
3
votes
2answers
535 views

Can wind be defined as momentum/mass of air molecules?

In the past I thought a breeze of wind was "made" from a large amount of air molecules going all the same direction in the same speed. But it's not like that, actually this voted answer, this site, ...
-1
votes
2answers
348 views

Is the average speed for any nitrogen molecule 422 meters per second?

Ok. TIL that a random moving particle of nitrogen in air moves at 422 meters per second. Folks, that's 944 mph, and about 80 m/s faster than the speed of sound. So is that correct?
1
vote
1answer
83 views

Relation between The speed and Temperature of the molecule

I'm fully aware of Gay-Lussacs Law, but when I was reading Feynman Lectures on Physics volume 1, sir said that the temperature and the speed of the gas (Ideal Gas) are proportional to each other. But ...
0
votes
3answers
81 views

Does a thermometer drifting down a river measure a different temperature than a still thermometer?

Let's say I took a thermometer and affixed it to the end of a poll. Then I went halfway across a bridge and held the other end of the poll and dipped the thermometer into the middle of a river and ...
0
votes
2answers
77 views

If an ideal thermal flask containing ice starts moving does the ice melt?

My physics teacher had told me that the kinetic energy generates heat..! Hence a thermal flask in motion would have higher temperature than it originally started with.. I believed it until few ...
0
votes
1answer
61 views

Is the kinetic theory of gas relative in nature

In kinetic theory of gas the foremost assumption is that the temperature of an object is due to the kinetic energy of the atoms/molecules contained in it. But as we know that kinetic energy is a ...