How is the musician shown changing the instrument to play different musical notes?

a.)changing the velocity of the sound wave

b.)changing the resonant frequency of the standing wave

c.) changing the amplitude of the sound wave

d.$ changing the length of the air column

Un jugador de beisbol batea un foul recto en el aire. la pelota deja el bate con una rapidez de 120 km/h. en ausencia de resistencia del aire. ? cual sera la rapidez de la pelota cuando la atrape el catcher

The act of moving from one place to another. a. locomotor b. aerobic c. stationary d. static

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