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HunusBest ResponseYou've already chosen the best response.0
In one of Linus Pauling's books he poses a problem on how much the temperature of 1kg of water will rise as it travels from the top of Niagra Falls to the bottom. My question is does the temperature rise? I thought the loss of potential energy was transferred into kinetic energy, not thermal. Can someone clarify?
 one year ago

Mani_JhaBest ResponseYou've already chosen the best response.4
The temperature does rise. The first law of thermodynamics states that "Work is heat, and heat is work". You'll notice that if a body moves with a high speed, it becomes hotter. Thermal energy is, after all, the kinetic energy of the particles inside the body. So, when kinetic energy increases, thermal energy does too.
 one year ago

HunusBest ResponseYou've already chosen the best response.0
I thought alot of the heat was as a result of collisions with the air molecules. So the energy is both kinetic and thermal?
 one year ago

Mani_JhaBest ResponseYou've already chosen the best response.4
Yups. Air resistance also heats it up, but very slightly.
 one year ago

HunusBest ResponseYou've already chosen the best response.0
So as an object approaches the speed of light and it's energy grows larger and larger, the object's temperature is growing very large as well?
 one year ago

HunusBest ResponseYou've already chosen the best response.0
Like not a particle tending toward the speed of light, but a rigid body.
 one year ago

Mani_JhaBest ResponseYou've already chosen the best response.4
Well, that is not possible, but assuming that it is, yes, the temperature will grow too
 one year ago

HunusBest ResponseYou've already chosen the best response.0
Okay. Thank you. You seem very knowledgeable when it comes to physics.
 one year ago

Mani_JhaBest ResponseYou've already chosen the best response.4
Well, Physics is my favourite subject, but I am still in the process of learning it. ;)
 one year ago

HunusBest ResponseYou've already chosen the best response.0
It's mine too. Is that what you're majoring in?
 one year ago

Mani_JhaBest ResponseYou've already chosen the best response.4
lol, I am still a high school student!
 one year ago

HunusBest ResponseYou've already chosen the best response.0
That's ridiculous. In a good way. I've thought you were a college student!
 one year ago

VincentLyon.FrBest ResponseYou've already chosen the best response.0
During the fall, the PE will be converted to macroscopic kinetic energy, and the temperature of the water will remain unchanged. But when the water crashed at the bottom, the macroscopic KE is transformed into microscopic KE. This increase in µ.ic KE produces the temperature rise.
 one year ago
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