Figure Q3(c) shows two police car, C1 and C2 are moving towards a robber, P from opposite directions. The sirens of the police cars produce identical frequency of 600 Hz. If the speed of C1 and C2 are 25 m/s and 20 m/s respectively, compute the beat frequency heard by P. (c) [Given the speed of sound wave in air = 343 m/s] P C, Figure Q3(c)

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Chapter17: Sound
Section: Chapter Questions
Problem 117P: Two eagles fly directly toward one another, the first at 15.0 m/s and the second at 20.0 m/s. Both...
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(c)
Figure Q3(c) shows two police car, C1 and C2 are moving towards a robber, P from
opposite directions. The sirens of the police cars produce identical frequency of
600 Hz. If the speed of C1 and C2 are 25 m/s and 20 m/s respectively, compute the beat
frequency heard by P.
[Given the speed of sound wave in air = 343 m/s]
P
C,
C,
Figure Q3(c)
Transcribed Image Text:(c) Figure Q3(c) shows two police car, C1 and C2 are moving towards a robber, P from opposite directions. The sirens of the police cars produce identical frequency of 600 Hz. If the speed of C1 and C2 are 25 m/s and 20 m/s respectively, compute the beat frequency heard by P. [Given the speed of sound wave in air = 343 m/s] P C, C, Figure Q3(c)
A fireworks rocket explodes at a height of 100 m above the ground. An observer on the
ground directly under the explosion experiences an average sound intensity of
7.0 × 10-2 W/m² for 0.2 s. Compute the
(d)
(i)
average power of the explosion, and
(i1)
sound level in decibels heard by the observer.
[Given the reference intensity, I. = 1 × 10-12 W/m²]
Transcribed Image Text:A fireworks rocket explodes at a height of 100 m above the ground. An observer on the ground directly under the explosion experiences an average sound intensity of 7.0 × 10-2 W/m² for 0.2 s. Compute the (d) (i) average power of the explosion, and (i1) sound level in decibels heard by the observer. [Given the reference intensity, I. = 1 × 10-12 W/m²]
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