Ahammer taps on the end of a 4.9 m long metal bar at room temperature. a microphone at the other end of the bar picks up two pulses of sound, one that travels through the metal and one that travels through the air. the pulses are separated in time by 10.4 ms. what is the speed of sound in this metal

The speed of sound in air is

The pulse moving in air covers a distance of  with this velocity, so the time it takes is


The problem says that the second pulse (moving in the metal bar) arrives with a delay of . Therefore, the time  at which the pulse in the metal arrives at the microphone is


The distance covered by this pulse is still , therefore we can find the speed of the pusle in metal (so, the speed of sound in this metal):

Hahahah jsu’s hsjshshsh. shjshshshsh.