Mr. Graba (mass 58 kg) is standing on a swim mat that is initially at rest. Having become warm Mr. Graba jumps off the mat with a velocity of 10 m/s East. With what velocity (include direction) does the 3 kg platform move after? The swim mat is not anchored

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.

The heliocentric and the geocentric models of the solar system included these central principles

Select the correct answer. what does the process of natural selection involve?