An unknown resistor is connected between the terminals of a 2.5 V battery. Energy is dissipated in the resistor at the rate of 0.580 W. The same resistor is then connected between the terminals of a 1.12 V battery. At what rate is energy now dissipated?

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present