Answer:
the answer to the question is a reflector
When light passes through one transparent medium to another transperent medium it bends and that beding of light is know as refraction of light !
Well it's energy comes from the sun since the sun gives it sunlight to help it grow
Volumetric cylinders and volumetric flasks
Answer:
Force on the object is 20 N
Explanation:
As we know that work done to raise the book from initial position to final position is known as potential energy stored in it
So here we know that

here we know that
U = 30 J
s = displacement = 1.5 m
so we have

