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Doppler effect
Page 2
Questions (318)
A car is traveling toward you at 40.0 mi/h. The car horn produces a sound at a frequency
of 480 Hz. What frequency do you hear?
9 answers
asked by
Ben
1,050 views
What frequency is heard by an observer who hears the 450 Hz siren on a police car
traveling at 35 m/s away from her? Assume that
3 answers
asked by
Ben
586 views
A train is moving parallel and adjacent to a highway with a constant speed of 23 m/s. A car is traveling in the same direction
3 answers
asked by
anonumous
670 views
As a train moves away from you, the frequency of its whistle is determined to be 475Hz. If the actual frequency was 500 Hz and
4 answers
asked by
kristen
722 views
A airplane is approaching you at a speed of 360km/h. If you measure the pitch of its approaching engines to be 512 Hz, what must
5 answers
asked by
justin
489 views
a red blood cell travels at a speed of 40 cm/s in a large artery. a sound with a frequency of 100 kHz enters a blood opposite
4 answers
asked by
aris
1,229 views
You are driving along a highway at 27.7 m/s when you hear a siren. You look in the rear-view mirror and see a police car
3 answers
asked by
itufizik
1,357 views
Suppose that a police car on the highway is moving to the right at 26 m/s, while a speeder is coming up from almost directly
3 answers
asked by
linds
640 views
As a train pulls out of the station going 45 m/s it blasts its horn, what is the frequency heard by the train if the passengers
3 answers
asked anonymously
44 views
A train moving with a speed of 31.8 m/s sounds a 136-Hz horn. Suppose a stationary observer sounds a horn that is identical to
3 answers
asked by
cassie
1,528 views
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
4 answers
asked by
Jon
1,342 views
Suppose that a police car on the highway is moving to the right at 20 m/s, while a speeder is coming up from almost directly
3 answers
asked by
Mary
961 views
I have 2 questions I can't solve. I am Stuck.
1. A person with very good musical pitch listens to a guitarist on a moving stage
1 answer
asked by
Dave
480 views
A siren on the top of the police car moving with a speed of 40 m/s emits sound at frequency of 820Hz. Ahead of the car, there is
3 answers
asked by
Maria
1,010 views
A star emits light with wavelength 120 nm. An observer on earth measures the wavelength of the light received from the star to
1 answer
asked by
gourav
480 views
Doppler Effect a flying bat emits squeaks at a frequency of 85 khz if a stationary observer picks up the frequency of the
2 answers
asked by
mohammed alnunu
754 views
Please help me... I have no idea where to begin...A tone of 4000 Hz is being played on a tuning fork. You run toward the tuning
2 answers
asked by
Taylor
494 views
After giving an intense performance, a confused and disoriented flautist has wandered onto the motorway! They are playing a
3 answers
asked by
Ben
493 views
A fire truck emitting a 450 Hz signal passes by a stationary detector. The difference in frequency measured by the detector is
3 answers
asked by
R
2,634 views
A fire engine is rapidly approaching the corner. Explain what happens to the frequency of the sound wave as the fire engine
4 answers
asked by
Kayla
822 views
"A source of sound of frequency f0 moves horizontally at constant speed u in the x direction at a distance h above the ground.
1 answer
asked by
doppler effect
421 views
A policeman in a stationary car measures the speed of approaching cars by means of an ultrasonic device that emits a sound with
4 answers
asked by
Bhodloza
1,617 views
How fast must we be approaching a distant galaxy emitting yellow light (590nm) for it to appear green (520nm)?
I believe it uses
2 answers
asked by
Fernandez
492 views
A factory siren emits a sound at 900hz.what frequency will be heard by the driver of a car traveling at 100km.h away from the
3 answers
asked by
Precious
707 views
A car horn is pitched at 520 Hz. The car travels along a straight road at a speed of 25 m/s. towards an observer walking at 2
6 answers
asked by
Sher
524 views
A student in a parked car honks the horn, which has a `proper' frequency of 320 Hz. An observer in an approaching vehicle
3 answers
asked by
Kelly
1,531 views
A hydrogen atom, when vigorously perturbed, can emit light with a frequency of 6.16·1014 Hz. When the same light from hydrogen
1 answer
asked by
Kelly
731 views
Doppler ultrasound is used to measure the speed of blood flow. If the speed of the red blood cells is v, the speed of sound in
1 answer
asked by
kira
664 views
At a factory, a noon whistle is sounding with a frequency of 484 Hz. As a car traveling at 77 km/h approaches the factory, the
1 answer
asked by
kira
479 views
Two identical tuning forks have frequencies of 512 Hz. If one is held by a listener while the other approaches at a speed of 7.2
1 answer
asked by
lindsey
371 views
A bat moving at 6.5 m/s is chasing a flying
insect. The bat emits a 37 kHz chirp and receives back an echo at 37.65 kHz. At what
2 answers
asked by
maura
826 views
A bat flying toward a wall at a speed of 6.47 m/s emits an ultrasound wave with a frequency of 27.5 kHz. What frequency does the
2 answers
asked by
bülent
519 views
Why do scientists observe blueshift in certain stars?(1 point)
Responses Light wave frequencies increase as an object moves
3 answers
asked by
hi
75 views
Why do scientists observe blueshift in certain start?
Stars with higher temperatures emit more light waves at the blue end of the
3 answers
asked anonymously
62 views
the pitch of a race cars motor sounds higher as it approaches an observer and sound slower when it travels away this is an
3 answers
asked by
ELA,Math,SS, and Sci question speedrunner
29 views
Which situations might cause two observers (A and B) to measure different frequencies for the same vibrating object? Select the
3 answers
asked by
billy bob joe
102 views
Why do scientists observe blueshift in certain stars?(1 point)
Responses Light wave frequencies decrease as an object moves
3 answers
asked by
billy bob joe
56 views
Why do scientists observe blueshift in certain stars?
a. Light wave frequencies decrease as an object moves toward the observer
3 answers
asked by
Connexus Student
84 views
Which situations might cause two observers (A and B) to measure different frequencies for the same
vibrating object? Select the
3 answers
asked anonymously
70 views
Why do scientists observe blueshift in certain stars? (1 point)
Light wave frequencies increase as an object moves toward the
3 answers
asked anonymously
95 views
Why do scientists observe blueshift in certain stars?(1 point)
Responses Light wave frequencies increase as an object moves
3 answers
asked anonymously
47 views
blueshift is observed when
a) a distant luminous object travels rapidly towards an observer b) a luminous object is stationary to
3 answers
asked anonymously
132 views
As a star moves further from Earth, we see a lower frequency wavelength. This is called a ______ effect
3 answers
asked anonymously
41 views
Blueshift is observed when
a. a luminous object is stationary compared to an observer b. a luminous object travels alongside an
3 answers
asked by
M
93 views
Why do scientists observe blueshift in certain stars?(1 point)
Responses Light wave frequencies increase as an object moves
3 answers
asked anonymously
38 views
Which situations might cause two observers (A and B) to measure different frequencies for the same vibrating object? Select the
3 answers
asked anonymously
47 views
Given a Helium-Neon laser-based fiber optic Doppler probe at an angle of 60¡C with a blood vessel that registers a frequency
1 answer
asked by
cs
464 views
you are standing on a street corner, and you hear a fire truck approaching. does the pitch of the siren stay constant, increase,
1 answer
asked by
erica
772 views
A person standing close to a railroad crossing hears the whistle of an approaching train. He notes that the pitch of the whistle
4 answers
asked by
Joan
2,102 views
A radar device emits microwaves with a frequency of 4.73E+9 Hz. When the waves are reflected from a van moving directly away
2 answers
asked by
Joan
576 views
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