Question

If the frequency from trumpet A is *f* and the frequency
from trumpet B is 3*f*, how is the speed of sound from A
compared to the speed of sound from B?

one-third as fast |

the same |

3 times as fast |

twice as fast |

half as fast |

Answer #1

The speed of sound is proportional to the square root of the
absolute temperature, defined by:
Tabs = 273 + Tc
where Tc is the temperature in degrees Celsius. A trumpet is
tuned to B♭ (466 Hz), when it is initially cold at 20◦C. After
playing for a while, it warms up to 30◦C. What is the new frequency
of the trumpet (i.e., how far out of tune is it)? Assume the speed
of sound at 20◦C to be 343...

20. Which of the following properties of a wave on a string most
affects the speed of the wave?
A) wave amplitude
B) string tension
C) wavelength
D) wave frequency
21.Alice is twice as far from a marching band as Bob. Alice
hears the marching band at _______ intensity compared to Bob.
A) one half
B) the same
C) double
D) one quarter
22. Claire runs away from a stationary loudspeaker playing
music, while Dennis stands still. The frequency of...

A sound wave of frequency f=300Hz produced by a moving source
40m/s is observed by a stationary observer. The speed of sound in
ambient air is 345 m/s.
As the source moves toward the observer, how far does the
source travel between subsequent wave pulses?
What is the apparent wavelength of the sound wave as perceived
by the observer?
What is the frequency of sound perceived by the observer?
Note, when the source is in motion, the speed of the...

A car and a truck, starting from rest, have the same
acceleration, but the truck accelerates for twice the length of
time. Compared with the car, the truck will travel
a.) twice as far
b.) three times as far
c.) 1.4 times as far
d.) four times as fare.) one half as far

A sound wave with a frequency f is created by a speaker in a
room full of nitrogen gas (call this room 1). The wave then travels
into another room (room 2), which is full of hydrogen gass.
a) Is the frequency of the wave in room 2 the same of different
than the frequency of the wave in the room 1? Explain briefly but
clearly
b) is the wave speed of the wave in room 2 the same of...

Sound wave 1 has a frequency of 200 Hz in a particular medium.
Sound wave 2 has a frequency of 300 Hz in the same medium. By what
factor does the speed of sound wave 2 differ compared to sound wave
1

a) A siren blares an apparent frequency of 1200 Hz as it drives
toward you a 30 m/s. If you are standing still, what is the actual
frequency of the siren? What frequency do you hear as it is driving
away from you?
b)When two trumpets play the same note, a tuner measures a beat
frequency of 2 Hz. If one trumpet is playing a 440 Hz note, what
frequency is the other trumpet playing?

Problem 6: Two students are
standing the same distance from a source of sound. The first
student receives a power of 246 × 10-6 W in their
eardrum. The second student receives σ = 1.17 times more
power in their eardrum.
(A) If the second student's eardrum has a diameter of d
= 1 cm what was the intensity of the sound that the student heard,
in watts per square meter?
(B) In this problem take the speed of sound...

A siren emitting a sound of frequency 1000 Hz moves towards you,
and away from a cliff at a speed of 25 m/s. a) what is the
frequency of sound you heard coming directly to you from the siren?
B) what is the frequency of sound you hear reflected from the
cliff? (speed of sound = 340 m/s).

I understand that it will be higher frequency—pleasure
explain what the wavelength/wave speed will be. I put this part in
bold so you can see.
A siren sounds on a stationary ambulance. As
compared to a stationary observer, an observer who is
driving towards the ambulance at a constant speed would
measure the sound wave produced by the siren to have:
i. a higher frequency, shorter wavelength, and the same
wave speed.
ii. a higher frequency, shorter wavelength, and a...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 9 minutes ago

asked 46 minutes ago

asked 49 minutes ago

asked 52 minutes ago

asked 1 hour ago

asked 1 hour 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