Asuitcase (mass m = 18 kg) is resting on the floor of an elevator. the part of the suitcase in contact with the floor measures 0.50 m × 0.15 m. the elevator is moving upward with an acceleration of magnitude 1.6 m/s2. what pressure (in excess of atmospheric pressure) is applied to the floor beneath the suitcase?

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.

What is the mass of the same rock on the earth

Ineed the answer to question 1 , i’m desperate