speed, volume, mass, temperature and power
The distance that light moves in a year is called a light year.
2) Light-year.
I think b is the answer but im not 100% sure
on a given inclined we know that net force is given by

here we know that

so here we have


so here acceleration depends directly on angle of inclination
now we also know that if height of the inclined is H and its length is L
then we can write

so the acceleration is given as

so acceleration also depends directly on height of the inclined plane