Final answer:
The unit of power is derived from the combination of SI base units. In the SI system, power is measured in watts (W), which is energy per unit time or joules per second (J/s).
Step-by-step explanation:
The unit of power is derived from the combination of SI base units. In the SI system, power is measured in watts (W), which is energy per unit time or joules per second (J/s).
For example, if an electrical device consumes 1000 joules of energy in 2 seconds, the power can be calculated by dividing the energy (1000 J) by the time (2 s), resulting in a power of 500 watts (1000 J/2s = 500 W).
Another common unit for power is horsepower (hp), with 1 horsepower equal to 746 watts (1 hp = 746 W).