5. A police car siren emits a frequency of 3900 Hz while driving down the road at a speed of 27.4. What frequency will a person driving a car at 20.7 m in the opposite direction behind the police car hear?
fobs =
Hz

An equinox occurs when a. neither end of earth's axis is tilted toward or away from the sun. b. the north end of earth's axis is tilted away from the sun. c. the north end of earth's axis is tilted toward the sun. d. earth's axis is parallel to the sun's rays. select the best answer from the choices provided a b c d

The two required components for a generator are

Which one of the following terms is used to indicate the natural tendency of an object to remain at rest or in motion at a constant speed along a straight line? velocity acceleration equilibrium force inertia