Name the part of the human eye which acts as a protective layer for the eye

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

The dot diagram represents the motion of the motorcycle as it moves from left to right

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