Tudent a runs down the hallway of the school at a speed of vo=5.00m/s, carrying a ringing 1024.00-hz tuning fork toward a concrete wall. the speed of sound is v=343.00m/s. student b stands at rest at the wall. (a) what is the frequency heard by student b? (b) what is the beat frequency heard by student a?

a)

b)

Explanation:

Given:

velocity of student A carrying the sound source,

frequency of sound,

speed of sound,

(a)

Mathematical expression of Doppler-Effect is given as:

where:

f' = observed frequency

f = frequency of sound

velocity of the observer

Putting respective values in the above eq.:

(b)

Beat frequency will be the frequency difference between the sound source and its reflection from the walls.