Quote:
Originally posted by Lunchbox7
Light has a certain ability for force (laser for example). A laser can manipulate its surrounding through a degree of force. Froce is speed x mass. If something can produce force (even as little as light) then it has to have a component of mass. I have no idea what relativistic speed is so I cant say anything there.
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Isnt what I said all along is that heat is the byproduct of the tranformation of onf one from of energy to another form of energy?
Isnt somthing hot if it produces heat? whether it comes from energy transformation or not. If you run your hand on a spinning wheel Im willing to bet your hand will get hot. Thus your hand gets hot from the wheel so you could accurately describe the spinning wheel as hot.
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Force is mass times acceleration, not speed.
I'll say again: light has no rest mass. It simply gains momentum when it has speed, and it requires force to change momentum, so light is capable of exerting a force. You're trying to apply Newtonian mechanics to relativistic situations. Above a small percentage of the speed of light, Newtonian physics breaks down pretty quickly.
I never disagreed with you that heat can be produced when converting between forms of energy.
It's your next step that bothers me. Like I said before, would you consider electricity hot? Or propane gas at 0 deg celcius? They can both produce heat when properly manipulated. Likewise, the spinning wheel probably isn't hot, at least not by virtue of what it is. If you put a thermometer on the wheel, it would register that the material of the wheel is at room temperature. When you grab the wheel, friction would convert the wheel's kinetic energy to heat, and then the wheel would
become hot. It's not the same thing as the wheel being hot in the first place.