Answer:
C)relies on the conversion of chemical energy from food into mechanical energy by muscles.
Explanation:
The answer is C. Chemical Energy
m = 66 kg
a = 2 m/s²
F = .....?
= 66 . 2
= 132 N
most commonly occurs because of the frequent pumping of water from the ground.
3.
If the reaction forms a new substance it's a chemical reaction.
see attached ... heart = a person
