Thermodynamics

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m (Second Law: Entropy)
 
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If no energy enters or leaves a system during a change in energy state, the [[potential energy]] of the system will always be less after the change than it was before the change.
 
If no energy enters or leaves a system during a change in energy state, the [[potential energy]] of the system will always be less after the change than it was before the change.
  
This means that when you do 100 Joules of work by lifting the rock, you spend more than 100 Joules of your own chemical potential energy, the excess becoming wasted heat energy that doesn't become potential energy in the rock and that you can't reuse for rock-lifting.
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This means that when you do 100 Joules of work by lifting the rock, the amount of gravitational potential energy added to the rock is ''less'' than 100 Joules, the excess becoming wasted heat energy that you can't reuse for rock-lifting.
  
 
==Analysis Use==
 
==Analysis Use==

Latest revision as of 16:41, 7 January 2013

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