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Question

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anonymous · Answer

so in 0.10 seconds the wave generator goes through 3 cycles; the frequency is $f=\frac{N}{\Delta t}=30\text{ Hz}$

anonymous · Answer

in one single second, there will be ten times as many waves produced (30)

yumyum247 · Answer

This is how i did it...
Given: # of loops = 3, d = 4.5m, t = 0.10sec.
required: F = ?
Solution : 3 loops = 3/4 λ
                            = 3/4 λ X 3
                             = 4.5 λ
                           V = d/t
                           V = 4.5 / 0.10sec
                            V = 45m/sec
                 
Frequency = V = f X  λ
                     V = 45m/sec / 4.5 λ
                      V = 10 Hz
Therefore the frequency is 10 Hz

yumyum247 · Answer

the question said "LOOPS" not cycles

yumyum247 · Answer

1 complete cycle = 4 loops

anonymous · Answer

eh, the language is ambiguous; a complete loop would be half a cycle, anyways, so in actuality that would represent one-and-a-half cycles in 0.1 seconds and so a corresponding 15 cycles in 1 second, or $f=15\text{ Hz}$

anonymous · Answer

can you define carefully what you mean by 'loop'? |dw:1436322714361:dw|