A falling raindrop
Kinetic energy and potential energy are both applied when a body or object is falling.
B. Neutrons or Protons Adding or removing protons from the nucleus changes the charge of the nucleus and changes that atom's atomic number. For example, adding a proton to the nucleus of an atom of hydrogen creates an atom of helium. (Actually, a few neutrons have to be added as well to make the new nucleus stable, but the end result is still helium.)
Answer:

Explanation:
Given that,
Force exerted on an antique car, F = 270 N
Time, t = 0.275 s
Distance, d = 0.3 m
To find:
The angular momentum given to the engine.
Solution,
We know that the relation between the angular momentum and the torque is given by :

Since, 






So, the angular momentum given to the engine is
.
Answer:
Electric force,
Explanation:
Given that,
Charge 1,
Charge 2,
Distance between charges, d = 2 km
The electric force is given by :
k is the electrostatic constant
F = 1294207.2 N
or
Hence, this is the required solution.
When referring to an isotope, you refer to the mass of its protons and neutrons combined
7 + 8 = 15, so you would refer to it as C. Nitrogen-15