Kinetic to heat (building a spaceship)
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From: J. Clarke on 15 Jun 2010 14:50 On 6/15/2010 2:24 PM, gb wrote: > On Jun 13, 6:18 pm, Sam Wormley<sworml...(a)gmail.com> wrote: >> On 6/13/10 5:01 PM, gb wrote: >> >>> Can impact into a bag filled with >>> sand absorb the impact into vibrations, where the sandbag itself would >>> move with less energy after the hit because some energy is lost, >>> absorbed? Do water bags colliding absorb energy of impact? My only >>> experiment revolves around five pool table balls hanging in line and >>> hitting the first one moves the last one. Can we make energy absorbed >>> so the last one moves just a little, then place these absorbing balls >>> to the bottom of the spaceship? >> >> Get some water balloons, go to the sandy beach, do some experiments, >> write down the experimental setup, record the data and experimental >> error and draw conclusions. Apply mathematical analysis. Write this >> all down in a lab notebook and get back to us. > > It should be interesting that hanging five pool table balls and > hitting the first one in the line sends the last one up. Yet this > momentum transferred through the balls does not apply with sand balls > where sand crystal vibrations remove this momentum of impact. > > The problem belongs to physicists to solve. Google "elasticity".
From: gb on 15 Jun 2010 15:53 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.
From: jbriggs444 on 15 Jun 2010 16:12 On Jun 15, 2:24 pm, gb <gb6...(a)yahoo.com> wrote: > On Jun 13, 6:18 pm, Sam Wormley <sworml...(a)gmail.com> wrote: > > > On 6/13/10 5:01 PM, gb wrote: > > > > Can impact into a bag filled with > > > sand absorb the impact into vibrations, where the sandbag itself would > > > move with less energy after the hit because some energy is lost, > > > absorbed? Do water bags colliding absorb energy of impact? My only > > > experiment revolves around five pool table balls hanging in line and > > > hitting the first one moves the last one. Can we make energy absorbed > > > so the last one moves just a little, then place these absorbing balls > > > to the bottom of the spaceship? > > > Get some water balloons, go to the sandy beach, do some experiments, > > write down the experimental setup, record the data and experimental > > error and draw conclusions. Apply mathematical analysis. Write this > > all down in a lab notebook and get back to us. > > It should be interesting that hanging five pool table balls and > hitting the first one in the line sends the last one up. Yet this > momentum transferred through the balls does not apply with sand balls > where sand crystal vibrations remove this momentum of impact. > > The problem belongs to physicists to solve. Where are the experimental results, the error analysis and the lab notebooks? In the absence of data, there is no problem to solve. In particular, what was the total momentum of the sand balls before and after impact? We don't want idle speculation about sand crystal vibrations. We want a reproducible experiment showing a failure of momentum conservation in an appropriately closed system. If you have one, we've got a Nobel prize nomination waiting.
From: Androcles on 15 Jun 2010 17:13 "gb" <gb6726(a)yahoo.com> wrote in message news:3ebb03b3-63a7-4242-80c9-71fec8e31f36(a)s4g2000prh.googlegroups.com... | 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. | You didn't look up heat. http://en.wikipedia.org/wiki/Heat
From: Uncle Ben on 15 Jun 2010 19:27
On Jun 15, 2:21 pm, gb <gb6...(a)yahoo.com> wrote: > > > Now I take away momentum, in that sense of 'internally lost energy of > > > momentum'. > > > You have missed a very fundamental finding in physics. Momentum > > is always conserved! There is no "internally lost energy of momentum" > > > You appear not to know the differences between the concepts of > > momentum, energy and thermodynamics. Easily remedied with a freshman > > level physics textbook. Google is your friend. > > Can impact momentum (from an object) into a sandbag evaporate energy > by scattering that energy in all direction between resonating sand > crystals? > > Never mind. Kinetic energy can change to heat energy, but there no way to lose momentum in a sandbag free to move on impact of a bullrt. |