In some areas of the world, like california and japan, earthquakes are a common occurrence. how can this best be explained? a) the strong ocean currents are undermining both areas causing earthquakes. b) both area are subjected to strong ocean wind and waves that causes earthquakes. c) both areas are located near the edge of the pacific ocean, the unstable sand causes earthquakes. d) both areas are on the boundary of active plate margins, the motion of the plates causes earthquakes.

Atennis player used a tennis racket to hit a tennis ball with a mass of 0.25 kg with a force of 5.25 newtons. how does the force the tennis racket exerted on the tennis ball compare with the force the tennis ball exerted on the tennis racket? a. the force of the tennis racket on the tennis ball is equal in magnitude and opposite in direction to the force the tennis ball exerted on the tennis racket. b. the force of the tennis racket on the tennis ball is equal in magnitude and in the same direction as the force the tennis ball exerted on the tennis racket. c. the force of the tennis racket on the tennis ball is less in magnitude and in the same direction as the force the tennis ball exerted on the tennis racket. d. the force of the tennis racket on the tennis ball is greater in magnitude and opposite in direction as the force the tennis ball exerted on the tennis racket.