You are driving on the highway at 40 m/s with another car driving next to you at exactly the same speed. When you honk your horn (with a frequency of 315 Hz),
what frequency of sound will the driver of other car perceive?
235 Hz
315 Hz
475 Hz
07.8 Hz

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.