Pleaaeseee help me. eee A sound is heard by a listener at A, who is 21 m from the clarinet.
(i) The clarinet starts to make a note of frequency 220 Hz.
Calculate how many vibrations the reed makes before the sound reaches the listener

The speed of sound in air is 330 m/s.

Which of the following are properties of mechanical waves? check all that apply ⭕️ particles of the medium move back and fourth, but do not move with the wave. ⭕️ the particles of the medium always move parallel to the wave motion. ⭕️ wave motion begins with a disturbance in the medium. ⭕️ waves transport energy from a source outward, away from the source.

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?

The slope of a velocity time graph over any interval of time gives the during that interval