What is the unit of measurement for power in terms of joules per second?

The unit of measurement for power in terms of joules per second is the watt. Power is defined as the rate at which energy is transferred or converted, and when that energy is measured in joules and the time in seconds, the resulting unit is the watt.

A watt quantifies how much energy is being used or produced over time. For instance, if an electrical device consumes 1 joule of energy in 1 second, it is operating at a power level of 1 watt. This relationship highlights the direct connection between power and energy over time, making the watt a crucial unit in fields involving electricity, mechanics, and thermodynamics.

The other options do not measure power in this way. A volt measures electrical potential, a newton measures force, and a joule measures energy. Therefore, the watt is the only unit among the choices that accurately represents power as joules per second.