The optical path of a monochromatic light is the same if it goes through 4m of glass or 4.5m of a liquid. If the refractive index of glass is 1.5, what is the refractive index of the liquid? Pls answer this I will mark you as the brainiest.

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?

What will a positive and a negative charge do if they are separated from each other?

Farmer a has a deep well and needs a lot of water for her animals and crops. her neighbor, farmer b, has a shallower well. he needs less water than farmer a because his farm is smaller. in years of drought, sometimes farmer b can't get any water from his wells. what can farmer b do to decrease the likelihood of his well running dry?