Kinetic to heat (building a spaceship)
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From: gb on 17 Jun 2010 15:29 > Showing failure of momentum conservation. > If you have one, we've got a Nobel prize nomination waiting. Two balls made of sand after collision on a pool table might not bounce off as quickly from one another as regular pool table balls. That in itself is proof. Those balls would do the same in space. Less speed results from the collision. That means that a lot of momentum is lost. I have seen balls that move just a few inches after being hit, seen such things somewhere in the hidden corners of my memory from my past. Maybe mud balls.
From: PD on 17 Jun 2010 15:36 On Jun 17, 1:17 pm, gb <gb6...(a)yahoo.com> wrote: > > > Heat is not kinetic energy. > > > > I looked up kinetic energy, you confused me on that. I defined it > > > properly originally as I started this thread, kinetic to heat. > > > What definition did you find that denies that heat is kinetic > > energy? > > Wikipedia: > > "The kinetic energy of an object is the extra energy which it > possesses due to its motion. It is defined as the work needed to > accelerate a body of a given mass from rest to its current velocity. > Having gained this energy during its acceleration, the body maintains > this kinetic energy unless its speed changes. Negative work of the > same magnitude would be required to return the body to a state of rest > from that velocity." > > This example to me refers to as science of objects moving in space. > > The kinetic energy is the working energy with such objects, rocket > science, etc. It relates to modulation of speed of an object. Wikipedia's article is of limited quality. Kinetic energy comes in two basic forms: ordered and disordered. The latter is the stochastic motion that is associated with thermal kinetic energy.
From: gb on 17 Jun 2010 15:36 > As far as gym bags go, they contain something that gives, like sand, instead > of something hard so people won't hurt themselves hitting them. So there is no such thing as absorbing impact by these gym bags? I heard in physics of things that absorb energy, can be typically friction, heat in physics. What would physics be without absorbing energy in any form, meaning loss of momentum because of non-bouncing qualities, particle vibrations within, where impact so to speak spreads not just linearly in vibrations and energy then is lost.
From: PD on 17 Jun 2010 15:38 On Jun 17, 2:29 pm, gb <gb6...(a)yahoo.com> wrote: > > Showing failure of momentum conservation. > > If you have one, we've got a Nobel prize nomination waiting. > > Two balls made of sand after collision on a pool table might not > bounce off as quickly from one another as regular pool table balls. > That in itself is proof. > > Those balls would do the same in space. > > Less speed results from the collision. That means that a lot of > momentum is lost. No. Momentum is a vector. It is conserved regardless of the "stickiness" of the collision. Ordered kinetic energy may in fact be reduced, but not momentum. Ordered kinetic energy can go into disordered kinetic energy (thermal energy or heat), configuration energy, potential energy, light radiation, or any of a number of other energy buckets. > > I have seen balls that move just a few inches after being hit, seen > such things somewhere in the hidden corners of my memory from my past. > Maybe mud balls.
From: jimp on 17 Jun 2010 17:56
gb <gb6726(a)yahoo.com> wrote: >> As far as gym bags go, they contain something that gives, like sand, instead >> of something hard so people won't hurt themselves hitting them. > > So there is no such thing as absorbing impact by these gym bags? Once again you show you have no clue about energy, momentum, velocity, their relationship, or how to calculate them. > I heard in physics of things that absorb energy, can be typically > friction, heat in physics. What would physics be without absorbing > energy in any form, meaning loss of momentum because of non-bouncing > qualities, particle vibrations within, where impact so to speak > spreads not just linearly in vibrations and energy then is lost. Gibberish. -- Jim Pennino Remove .spam.sux to reply. |