As you drive down the road, you see and hear an ambulance go by you in the
opposite direction. after it passes, how is the frequency you hear different
from that being produced by the ambulance?
o
a. it is higher due to the doppler effect.
b. it is lower due to the doppler effect.
o
c. it has not changed, as the two vehicles cancel each othe_out.
o
d. it depends on which vehicle is moving the fastest.

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?

The energy released by a nuclear fusion reaction is produced when

If a star is moving toward earth, it is