The Doppler effect seems to effect which aspect of a traveling wave?

You throw a baseball directly upward at time t = 0 at an initial speed of 12.3 m/s. what is the maximum height the ball reaches above where it leaves your hand? at what times does the ball pass through half the maximum height? ignore air resistance and take g = 9.80 m/s2.

F500 j of energy were added to 1 kg of each of these samples, which would experience the least temperature increase?

If steel is more dense that lake water, why can a boat float