What produces an electromagnetic wave?
a) an oscillating or accelerating electric charge
b) an electric charge moving at constant velocity
c) a static electric charge
d) a magnetic monopole moving at constant velocity

Abatter hits the baseball a with an initial velocity of v0 = 110 ft/sec directly toward fielder b at an angle of 23° to the horizontal; the initial position of the ball is 2.2 ft above ground level. fielder b requires 0.44 sec to judge where the ball should be caught and begins moving to that position with constant speed. because of great experience, fielder b chooses his running speed so that he arrives at the “catch position” simultaneously with the baseball. the catch position is the field location at which the ball altitude is 8.4 ft. determine the velocity of the ball relative to the fielder at the instant the catch is made.

Could someone me find the answer to this problem.

The softest and hardest minerals are: softest hardest