Physics, 30.01.2020 15:01 susannaking5742

1. a 1,000-kg car has 50,000 joules of kinetic energy. what is its speed?

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Physics, 22.06.2019 10:10, xavierfox1721

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Physics, 22.06.2019 16:00, meowmeowcow

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Physics, 22.06.2019 19:30, isiahb123

A47.2 g block of copper whose temperature is 480 k is placed in an insulating box with a 91.8 g block of lead whose temperature is 200 k. (a) what is the equilibrium temperature of the two-block system? (b) what is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) what is the change in the entropy of the two-block system? the heat capacities of copper and lead are 386 j/kg·k and 128 j/kg·k, respectively.