What is the ma of a lever with input arm length= 5m and output arm length =2m?

Which property of fossils allow scientists to determine the relative rock ages..

How does the image distance (di) of a convex lens compare with the image distance of a concave lens? a. the image distance of the convex lens is positive, and that of the concave lens is negative. b. both are negative for a virtual image. c. both are positive for a virtual image d. the image distance of the convex lens is negative, and that of the concave lens is positive.

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec