A source emits sound with frequency 1000 Hz. A second source emitting sound simu

Question

A source emits sound with frequency 1000 Hz. A second source emitting sound simultaneously causes a 5 Hz intensity variation to appear. What are the possible frequencies of the second source?
A) 0.004 Hz and 4000 Hz B) 0.004 Hz and 200 Hz C) 995 Hz and 1005 Hz D) 995 Hz and 4000 Hz E) 250 Hz and 5000 Hz A source emits sound with frequency 1000 Hz. A second source emitting sound simultaneously causes a 5 Hz intensity variation to appear. What are the possible frequencies of the second source?
A) 0.004 Hz and 4000 Hz B) 0.004 Hz and 200 Hz C) 995 Hz and 1005 Hz D) 995 Hz and 4000 Hz E) 250 Hz and 5000 Hz A source emits sound with frequency 1000 Hz. A second source emitting sound simultaneously causes a 5 Hz intensity variation to appear. What are the possible frequencies of the second source?
A) 0.004 Hz and 4000 Hz B) 0.004 Hz and 200 Hz C) 995 Hz and 1005 Hz D) 995 Hz and 4000 Hz E) 250 Hz and 5000 Hz

Explanation / Answer

let the frequency of other source be 'f'

so f - 1000 = 5    or   1000 - f = 5

f = 1000 + 5      or f = 1000 - 5

f = 1005 Hz       or     f = 995 Hz

C) 995 Hz and 1005 Hz

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