Determine the power of 600 joules of work done in 4 seconds

Power may be defined as the rate of doing work or the rate of using energy. It can be calculated by dividing the energy output or the work done over the time period. It is calculate as follows:

P = W / t
P = 600 J / 4 s
P = 150 Watts

a). you know from previous experience that steaming things are hot,
so you infer that this one will also be.

b). you know from previous experience that rain often happens after you see
dark clouds in the sky, so you infer that it will also happen this time.

c). when two chemicals are mixed together, you observe bubbles forming.

d). from previous experience seeing plastic bags moving along the ground
on a windy day, you infer that the wind is the cause of their behavior.