/sci/ - STEM

Is cold air denser than hot air? Anonymous 18/02/27(Tue)19:46 No. 16630 ID: dfa669

File 151975716827.jpg - (92.68KB , 1024x768 , IMG_0592.jpg )

Plz help

Anonymous 18/02/28(Wed)01:07 No. 16631 ID: a5c275

Yes. You would have known that by now: hot air balloons rise due to the warm air being less dense. The molecules in warm air spread out, becoming less dense, conversely, cold air molecules remain close, making it dense.

-M

Anonymous 18/03/02(Fri)04:56 No. 16632 ID: 6914e6

volume = mass / pressure * temperature * constant

If you hold all the variables on the right side but increase the temperature, the volume also increases, and since density = mass / volume, when the volume increases, the density decreases. So an ideal gas under constant pressure becomes less dense as the temperature increases.

Anonymous 21/12/17(Fri)11:24 No. 17963 ID: 7f5b34

No. Hot air has more energy than cold air. And if we take Einstein's retarded equation E=MC^2, we know that energy is equals to mass.

And since density is the amount of mass per volume, then you'd have to take energy into account for the mass. And therefore, cold air is not denser than hot air.

Anonymous 22/03/24(Thu)16:29 No. 18205 ID: abdc5b

>>16630
yes r3tard

Anonymous 22/06/19(Sun)13:21 No. 18282 ID: e5a2d8

>>17963
This fucking retard is inventing physics right now.
That's fucking relativistic energy. Not only that, but relativistic energy at rest with velocity equals to zero. Not only that but without taking into account other Forms of energy. Kinetic energy, potential energy, chemical energy etc..
And this has nothing to do with relativistic parameters, it has to do with diffusion and increasing internal energy increases molecular velocity. So with diffusion they tend to occupy a larger portion of space thus reducing their density.
It is a consequence of the random paths the particles take and the energy potential between each one of them.