# Energy convertion - kinetic to heat

1. Oct 5, 2011

### karen_lorr

Hi All

I am stuck with this (Not homework - jusrt writting a paper, well trying to anyway ;-)

I wondered in anyone could offer some advice or a link to a webpage with more info - I have googled this any can't find anything for days.

I am trying to discover how kinetic energy would be converted to heat.

EDIT

I found the answer here in this forum

Last edited: Oct 5, 2011
2. Oct 5, 2011

### sophiecentaur

"Just rub your hands together and blow" (variation on a well know film quotation)

3. Oct 5, 2011

### Lsos

Probably most kinetic energy on earth gets eventually converted to heat through friction.

The wind blowing, a car driving, you walking, a fan spinning, a wave waving and whatever else you can think of. It all eventually stops. It might turn into various forms of energy but ultimately it mostly ends up as heat.

4. Oct 10, 2011

### karen_lorr

Many thanks to everyone who has taken the time to read and answer my questions. I really do appreciate it.

This is what I have come up with - (trying to explain one method of Ice (Ih) bonding).

I'm getting to the end of this now - 2 years work, .
From atomic structure I am now up the "then they fall out of the sky section"

The act of falling through the air may cause the outer sections to warm up (friction). As the crystal falls through the air it comes into contact with (and due to gravity, pushes aside) other particles, e.g. oxygen or nitrogen molecules, other crystals, etc. and, in doing so, the crystal’s own particles are moved/accelerated away from their original path. When particles are accelerated their kinetic energy, which object have due to their motion, is increased, of course this means that the other crystal’s energy is reduced, as it has been transferred (Conservation of Energy Law). Temperature is a measurement of the average kinetic energy of (in this case) the ice crystal – heat is the energy that is transferred from one object to another. So, the heat created by the Friction increases the depth of the Quasi Liquid Layer; as the crystal’s outer molecules now have more energy, they, consequentially, move/vibrate more. If the crystal comes into contact with another, the warmer outer areas (of both crystals) will, on contact, freeze again due to the heat/energy being dissipated throughout the now combined/enlarged crystal, as the average temperature (of the joined crystals) is below that which is required to freeze the whole. This process (crystals and crystal bunches bonding together) can continue until extremely relatively large snowflakes are formed.