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Heat - What is it?

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clrumivier4life
Posts: 2429 - Karma: 9
So I randomly decided to fill my sink with hot water and watch ice melt in it. I filled it, put some ice in, and was amazed. (OOOO AHHH) I then stuck my hand in and realized that, in fact, it was hot. But then I wondered, what makes it 'hot'? Temperature is a measure of the energy of particles. 'Hot' describes high energy, meaning the particles are moving back and forth faster. But what about these particles moving makes you feel the sensation called 'Heat'. Is it that the particles collide with your hand, causing some sort of stinging feeling? Or is it that the particles collide with eachother which makes them lose some energy to heat? If it was the latter, what is this energy? What makes the energy given off by particles colliding get to your hand? Wouldn't it need more high-energy particles to transfer through 'space'? I'm stumped. If heat is some sort of 'energy' that somehow gets to your hand through some transportation, how can it be that you actually feel this 'heat'? Then I started thinking about snow, and how it melts. Does the energy of particles hit against the snow particles and transfer energy to them that way? Makes sense to me, which would show that the particles are the 'heat' and that that is what you're feeling against your skin. This then made me think about body temperature. Do you need body temperature because it is the energy in which everything happens? Like your blood flowing, nerves sending signals to your brain, and such. If you lost temperature would everything stop functioning properly because you lost 'energy' and thus the blood flows slower since the particles do not collide, the sensations from nerves don't get to the brain as fast because they are lower energy? Makes you think....Now back to my baked potatoes.


SkeeOrDie: I don't hate boarders, I hate fuckers, and 8-year olds that call everyone nigger face.
Jan 2 2005 12:50PM
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lightingfarts
Posts: 564 - Karma: 14
your hand feels the energy, and your brain makes your hand feel 'warm' or whatever as a warning. when you touch something thats super hot, your brain makes you feel pain so you jerk your hand away.
Jan 2 2005 12:57PM
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hazel_32
Posts: 170 - Karma: 14
the faster the molecules are moving the hotter something is....a microwave vibrates the molecules in your food...thats why that get hot...same with everything else...more active molecules




Brian
Jan 2 2005 1:00PM
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clrumivier4life
Posts: 2429 - Karma: 9
I know that. But what causes the sensation on your hand? Is it the particles colliding? That would be more like a ton of little pains on your hand that the nerves feel, but pain generally doesn't feel like heat. Like landing your ass on a rail doesn't feel like heat. So then I figure heat must be some other form of energy, which sparks the other questions i had about it.


SkeeOrDie: I don't hate boarders, I hate fuckers, and 8-year olds that call everyone nigger face.
Jan 2 2005 1:00PM
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clrumivier4life
Posts: 2429 - Karma: 9
'Temperature is a measure of the energy of particles. 'Hot' describes high energy, meaning the particles are moving back and forth faster.'


SkeeOrDie: I don't hate boarders, I hate fuckers, and 8-year olds that call everyone nigger face.
Jan 2 2005 1:01PM
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twix_182
Posts: 9248 - Karma: 27
and does the molecules moving faster act like friction when rubbing ur hands fast?


Take me to your special place
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Jan 2 2005 1:31PM
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clrumivier4life
Posts: 2429 - Karma: 9
Hmmm, logical.


SkeeOrDie: I don't hate boarders, I hate fuckers, and 8-year olds that call everyone nigger face.
Jan 2 2005 2:28PM
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fcskier27
Posts: 736 - Karma: 11
wen molecules move faster they cause more friction and thats wat warms up ur hand





oh well
Jan 2 2005 2:33PM
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Inthefridge
Posts: 207 - Karma: 15
Its the collisions between the molecules and your hand that makes them hot. The faster the particles are the more energy they have. Then when they collide with your hand they tranfer more energy to your hand because of their higher velocity. This enegy is heat. Hot hands.
Jan 2 2005 2:37PM
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Forum*
Posts: 3455 - Karma: 10
doesn't friction cause energy?
«*$*Carney*$*»

One time at mount Mckay..........
Jan 2 2005 4:01PM
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Jasmine
Posts: 1489 - Karma: 10
hmm yeah, seems like particles rubbing against skin molecules is what causes pain, but pain can be caused by a number of factors. the rail in the ass analogy doesn't quite match up.



Life is not a journey to the grave with the intention of
arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly
proclaiming...'Wow! What a ride!'
Jan 2 2005 4:01PM
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big_jibbin
Posts: 93 - Karma: 10
'heat' is energy, heat can take two general forms
a)infrared radiation or b)vibrating molecules
when you put your hand in hot water the molecules of water start to make you molecules in your hand vibrate faster and faster, this can cause bad effects for cells, and interfere with cell function, and cause chemical reactions to speed up, one of them being burning(reacting with oxygen). So neurons that sense the vibrating molecules in your hands vibrate and these are converted to electric signals to your brain. The sensation of hotness is just the abstract representation of input from these neurons, these neurons also control coldness and are sometimes confused, which is why extremely hot things sometimes almost feel cold, like a hottub. That is through conduction.
Heat energy can also be transferred through cetain wavelengths of light, which is how heat energy gets here from the sun, through empty space. When atoms absorb this wavelength of light they increase theyre average kinetic energy(temperature)
Jan 2 2005 4:34PM
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Forum*
Posts: 3455 - Karma: 10
no the heat from the particles destroy cells/molecules in your skin, and the nerve cells then tell your brain that hurts
«*$*Carney*$*»

One time at mount Mckay..........
Jan 2 2005 8:07PM
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