It’s e 2.0 x 10^-4 because it is a fraction
A. lunar phases result from the changing lunar mass. Let me know if this helped.
Answer:
when a two bodies A and B are moving at an angle 180° with each other then the relative velocity is the sum of bodies the velocity .i.e,
when the bodies move the opposite direction
then their relative velocity is the sum of individual velocities.
Friction? For example, like when a car's tires skid on rough concrete.
