Question

Two automobiles are equipped with the same singlefrequency horn. When one is at rest and the other is moving toward the first at 19 m/sm/s , the driver at rest hears a beat frequency of 4.0 HzHz . What is the frequency the horns emit? Assume T=20∘C

Answer #1

Two automobiles are equipped with the same single frequency
horn. When one is at rest and the other is moving toward the first
at 18 m/s, the driver at rest hears a beat frequency of 4.5 Hz.
What is the frequency (Hz) the horns emit? Assume T = 20 degrees
C

What is the Doppler effect? Discuss one practical application of
Doppler effect.
A bat at rest sends out ultrasonic sound waves at 60.0 KHz and
receives them returned
from an object moving directly away from it at 30.0 m/s. What is
the received sound
frequency?
Two automobiles are equipped with the same single frequency
horn. When one is at rest
and the other is moving toward the first at 20 m/s, the driver at
rest hears a beat frequency
of...

Two cars moving with the same speed are approaching each other
from opposite directions. The driver of one of the car blows his
horn, which emits sound with the frequency of 400 Hz. The driver in
the other car hears the frequency of 450 Hz. What is the speed of
the cars if the speed of sound is 340 m/s?

A stone is dropped from the top of a cliff. The splash it makes
when striking the water below is heard 3.2 s later. How high is the
cliff?
2. The pressure variation is a sound wave is given by Δ P =
0.0035 sin (0.38 π x – 1350 π t) Determine a. the wavelength b. the
frequency c. the speed and d. the displacement amplitude of the
wave. Assume the density of the medium to be 2.2 x...

Two cars traveling with the same speed move directly away from
one another. One car sounds a horn whose frequency is 436 HzHz and
a person in the other car hears a frequency of 390 HzHz.
Part A
What is the speed of the cars?
the answer is not 20.23

Two semi-trucks are moving toward each other at 31.9 m/s
relative to the ground (meaning this is the speed of each truck
with respect to the ground). One truck is honking its horn that has
a frequency of 530 Hz.
(a) What frequency is heard by the driver of the other truck
when there is no wind?
(b) What frequency is heard by the driver of the other truck
when the wind is blowing at 31.9 m/s toward the horn...

Two trains emit 445 Hz whistles. One train is stationary. The
conductor on the stationary train hears a 3.1 Hz beat frequency
when the other train approaches. What is the speed of the moving
train?

A person is standing at a train station, and two identical
trains are passing each other 100 m down the tracks. Train A is
moving away from him at 20 m/s, and train B is moving toward him at
20 m/s. As the trains pass each other, they emit identical pulses
of sound from their horns. At the instant that the pulses are
sounded, the trains' horns are both precisely 100 m away from him.
What will the person hear?...

Two loudspeakers, 1.4 m apart, emit sound waves with the same
frequency along the positive x-axis. Victor, standing on
the axis to the right of the speakers, hears no sound. As the
frequency is slowly tripled, Victor hears the sound go through the
sequence loud-soft-loud-soft-loud before becoming quiet again.
What was the original sound frequency? Assume room temperature
of 20∘C.

1. If a wind instrument, such as a tuba, has a fundamental
frequency of 30.1 Hz, what is its first overtone? It is closed at
one end and the speed of sound is 334 m/s.
2. Find the length of an organ pipe closed at one end that
produces a first overtone frequency of 276 Hz when air temperature
is 21.3ºC .
3. A “showy” custom-built car has two brass horns that are
supposed to produce the same frequency but...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 1 minute ago

asked 6 minutes ago

asked 8 minutes ago

asked 17 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago