Power is the amount of work done over a period of time. If you will put that into an equation, the formula of power will be:
P = W/t
Where:
P = power
W=work
t = time
Your problem already provides you with work and time so all you need to do is divide:
P = W/t
P = 50J/30s
P = 1.67 W
i think the answer is B police siren.
The beginning of the Phanerozoic is marked by the development of hard body parts, such as shells and bones.
