Posted by **Jon** on Sunday, April 6, 2008 at 5:34pm.

1)As a sound source moves away from a stationary observer, the number of waves will.

decrease

2)How fast should a car move toward you for the car's horn to sound 2.88% higher in frequency than when the car is stationary? The speed of sound is 343 m/s.

fs(v-vd/v-vs)

343(1/1-987/343)

A)4.5 m/s

B)7.3 m/s

C)9.6 m/s

D)11.8 m/s

I'm doing something wrong I got D (well I guessed D)

3)A car moving at 16.0 m/s, passes an observer while its horn is pressed. Find the difference between the frequencies of sound heard when the car approaches and when it recedes from the stationary observer. The velocity of sound is 343 m/s and the frequency of the sound of the car's horn is 583 Hz.

4)A boy is blowing a whistle of frequency 536 Hz and walking toward a wall with a speed of 1.64 m/s. What frequency of the reflected sound will the boy hear if the speed of sound is 343 m/s?

## Answer This Question

## Related Questions

- physics - 1)As a sound source moves away from a stationary observer, the number ...
- physics - 1)As a sound source moves away from a stationary observer, the number ...
- Physics - 1)As a sound source moves away from a stationary observer, the number ...
- physics - How fast should a car move toward you for the car's horn to sound 2.88...
- DrBob222 - How fast should a car move toward you for the car's horn to sound 2....
- Physics!! - A car moving at 16.0 m/s, passes an observer while its horn is ...
- DrBob222 - A car moving at 16.0 m/s, passes an observer while its horn is ...
- Physics - A car sounding its horn (rated by the manufacturer at 600 Hz) is ...
- physics - You are traveling in a car toward a hill at a speed of 40.8 mph. The ...
- DrBob222 - As a sound source moves away from a stationary observer, the number ...

More Related Questions