Which field is this? Explain what's happening.

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?

Which of the following are forms of phase changes a. freezing b. condensation c. heating d. exchanging

This problem has been solved! see the answer capacitor 2 has half the capacitance and twice the potential difference as capacitor 1. what is the ratio (u_{\rm c})_1/\,(u_{\rm c})_2