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A student in a parked car honks the horn, which has a `proper' frequency of 300 Hz. An observer in an approaching vehicle measures the frequency of the sound.
Where will the plane be when it is finally heard?(Assume an average value of 330m/s for speed of sound in air).
John and Sue are descending on ropes into a cave. Sue's rope breaks and she falls screaming past John. Apply doppler effect.
Two automobiles are equipped with the same single frequency horn. When one is at rest and the other is moving toward an observer at 15.9m/s.
Ultrasound reflected from an oncoming bloodstream that is moving at a 30 cm/s is mixed with the original frequency of 2.5 MHz.
What is the observed frequency if the observer moves away from the source instead?
What frequency do you detect if you move with a speed of 30.0m/s (a) toward the car, and (b) away from the car?
When a visible light is receding, its color will? a. shift toward the blue end of the spectrum.
A siren is mounted on a tower and emits a sound whose frequency is 2140 Hz. A person is driving a car awayf rom the tower at 27 m/s.
If your roommate turns up the radio, increasing the sound level from 70 dB to 76 dB, what is the factor by which the intensity (in W/m^2) increases?
A whistle you use to call your hunting dog has a frequency of 21 kHz, but your dog is ignoring it. You suspect the whistle may not be working.
Particles approximately 3.0 X 10-2 cm in diameter are to be scrubbed loose from machine parts in an aqueous ultrasonic cleaning bath.
If source stays still, but the person moves toward the sound source at 20 m/s, what frequency will the person hear?
A stretched wire gives a beat frequency of 2 beats per second when sounded with a tuning fork when its length is 1.43.
A French submarine and a U.S. submarine move toward each other during maneuvers in motionless water in the North Atlantic.
Two submarines are underwater and approaching each other head-on. Sub A has a speed of 13 m/s and sub B has a speed of 7 m/s.
A person in a cave emits a sound and receives and echo 2.5 seconds later. How far is that person away from the wall?
An open organ pipe is 0.50 m long. If the speed of the sound is 340 m/s, what are the pipe's fundamental frequency and the frequencies.
A clarinet acts as a closed-ended air column. If its bottom note has a frequency of 130 Hz, how long is the column?
How fast should the platform move, vp, for the person to detect a beat frequency of 4.00Hz? (Take the speed of sound to be 344m/s).
Determine the proper time measured by both observers between the origin and the point found in part (a).
You are traveling at 99% the speed of light. As you approach a meter stick, what would you perceive its length (in centimeters) to be?
As the drawing shows, a carpenter on a space station has constructed a 30.0 degree ramp. A rocket moves past the space station with a relative speed.
On his 30th birthday, a twin gets on a spaceship travelling at 4/5c which takes him to a distance star system.
Convert the following angles from degrees to radians, to three significant figures: a) 15°, b) 45°, c) 90° and d) 120°.