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.

Auniform crate c with mass mc is being transported to the left by a forklift with a constant speed v1. what is the magnitude of the angular momentum of the crate about point a, that is, the point of contact between the front tire of the forklift and the ground