2 j x b
H c e c hope this helppppsssssssss
A. because as the merry-go-round spins the child accelerates towards the center of the merry-go-round at a uniform rate.
Beat frequency, fb = |f2-f1|
That is, beat frequency is the absolute difference between two frequencies. Is is as a results of destructive and constructive inferences.
Therefore, in this case:
fb = 203 - 199 = 4 Hz