Physics, 04.10.2019 20:00 hinojosachristian1
You are using a gas powered pump to raise 100 kg of water to a height of 100 m. the energy efficiency of the pump is 20%. by what amount has the internal energy of the water and pump changed?
for this problem i first did:
change in potential energy = mgh
change in potential energy = 100 * 9.81 * 100
change in potential energy = 98.1 kj
but i don't know how to use the efficiency
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You are using a gas powered pump to raise 100 kg of water to a height of 100 m. the energy efficienc...
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