Which best describes pitch? (a. the number of cycles per second perceived by the human ear
(b. the amount of time taken for a longitudinal wave to produce one cycle
(c. the distance between two corresponding parts of a transverse wave
(d. the amplitude of a wave when the natural frequency is matched

Efficiency is the ratio of to for a system a)power in to power in b)power in to power out c) power out to power out d) power out to power in

By what primary heat transfer mechanism does the sun warm the earth?

Aloop of wire is in a magnetic field such that its axis is parallel with the field direction. which of the following would result in an induced emf in the loop? choose all that apply. a loop of wire is in a magnetic field such that its axis is parallel with the field direction. which of the following would result in an induced emf in the loop? choose all that apply. moving the loop outside of the magnetic field region. spin the loop such that its axis does not consistently line up with the magnetic field direction. change the magnitude of the magnetic field. change the diameter of the loop