An electrically powered pump is used to pull water out of a well. In the course of an afternoon, the pump does 8.3 kJ of work lifting water out of a well?
An electrically powered pump is used to pull water out of a well. In the
course of an afternoon, the pump does 8.3 kJ of work lifting water out of a well.
It also heats up, and releases 300 J of heat to the environment before returning to
its original temperature. If there was no net change in the energy of the pump,
how much electrical energy was required?
An electrically powered pump is used to pull water out of a well. In the
course of an afternoon, the pump does 8.3 kJ of work lifting water out of a well.
It also heats up, and releases 300 J of heat to the environment before returning to
its original temperature. If there was no net change in the energy of the pump,
how much electrical energy was required?
2 Answers
May 9, 2016
May 9, 2016
Explanation:
Mechanical Work done by the pump
Heat generated in the pump, due to internal resistance both electrical and friction
Also given that change in energy of pump
Inserting giving values we get
Total electrical energy was required