A submarine A travelling at 18km hr ^ - 1 is being chased along the line of its velocity by another submarine B travelling at 27km hr ^ - 1 . B sends a sonar signal of 500Hz to detect A and receives a reflected sound of

Question

Quantrex Academy · Accepted Answer

Correct answer: C. 502Hz

V _ A = 18km h ^ - 1 = 5m s ^ - 1 ; V _ B = 27km h ^ - 1 = 7 .5 m s ^ - 1 Frequency received by A , f _ A = f _ 0 ((1500 - 5)/(1500 - 7 .5)) Frequency of reflected wave as heard by B . f ^ ' B = f _ A ((1500 + 7 .5)/(1500 + 5)) = f _ 0 ((1500 - 5)/(1500 - 7.5))((1500 + 7.5)/(1500 + 5)) = 500((1495)/(1492.5))((1507.5)/(1505)) = 501.67Hz 502Hz

A submarine A travelling at 18km hr ^ - 1 is being chased along the...

Options

Correct answer

Step-by-step solution

More from Waves and Sound