An FM radio station broadcasts with a power of 10 kW at a frequency of 101 MHz. How many photons does the antenna emit each second?

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.

Which statement correctly describes the interaction between magnetic poles? north and south poles attract each other. north and south poles repel each other. two north poles will attract each other. two south poles will attract each other.

Robin is swinging back and forth from a trapeze. in which of the following situations is his kinetic energy being transformed into potential energy