How much charge passes through a radio battery of 9 V if the energy expended is 620 mJ?

The speed of light can be used to measure the

Ethanol has a heat of vaporization of 38.56 kj/mol and a normal boiling point of 78.4 c. what is the vapor pressure of ethanol at 14 c?

Current from a charged capacitor lights a bulb. as time goes on the brightness of the