5. One watt of electrical power is produced when
A. one ampere of current flows due to an applied voltage of one volt.
B. work is done to move electrons with respect to time.
C. electrical pressure is present in a circuit.
D. a conducting path is present between two opposing electrical charges.

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.

Select the three ways that the parallel-plate capacitor differs from a car battery.

Aforklift raises a box above the floor and does 2,000 j of work. if the forklift motor consumes 3,000 j of electrical energy from the battery to raise the box, what is the efficiency of the lift?