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A system does 112 J of work on its environment and gains 72 J of heat in the process.
(a) What is the change in the internal energy of the system?
J
(b) What is the change in the internal energy of the environment?
A person, with his ear to the ground, sees a huge stone strike the concrete pavement. A moment later two sounds are heard from the impact: one travels in the air and the other in the concrete, and they are 6.60s apart. How far away did the impact ..
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