Both the moon and the sun influence the tides on earth. the moon has a much greater influence though. why is that? a) because the sun is much less dense b) because the sun is gaseous, not solid c) because the sun is so far away from earth d) because the sun is less massive than the moon

You throw a baseball directly upward at time =0 at an initial speed of 14.9 m/s. what is the maximum height the ball reaches above where it leaves your hand? ignore air resistance and take =9.80 m/s2.

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge

1. do the particles in the medium material move in the same direction of the wave or at opposite direction to the wave? explain your answer. 2. by inputting more energy into the wave, i. e a large shake of the spring, which wave property also increases? 3. are there forces of friction acting while a wave is passing through a medium?