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April 20, 2014

Search: Physics - Doppler Effect

Number of results: 112,960

physics
Explain the Doppler Effect?
Thursday, April 12, 2012 at 4:41pm by jeff

Physics - Doppler Effect
25.0 m/s
Monday, March 28, 2011 at 9:06pm by kavi

Physics
thank you, is this related to the doppler effect
Thursday, August 22, 2013 at 2:51pm by Janae

Physics
It is exactly the Doppler effect.
Thursday, August 22, 2013 at 2:51pm by Damon

Physics
Question about doppler effect: How do you solve when it gives you percentage value? (Q 1) How do you calculate for doppler effect when the listener is moving instead of the source of sound? (Q 2) Questions 1. As a racing car zooms by you, its pitch decreases by 20%. If the ...
Wednesday, November 25, 2009 at 11:46pm by Tommy

physics
how does the doppler effect relate to destructive interference?
Friday, April 1, 2011 at 8:56pm by ashley --- HELP PLEASEE!!!

Physics
I need a complete list all the doppler effect equations for a beginner physics class. Here is a sample questions so you know the level Question: Two trains on separate tracks move toward one another. Train #1 has a speed of 130 km/hr and train #2 a speed of 90km/hr. Train 2 ...
Thursday, July 7, 2011 at 7:58pm by Tina

Physics
Read your lesson about the Doppler effect and apply the appropriate formula.
Sunday, November 14, 2010 at 1:34pm by drwls

Physics-Please help
Could someone provide me with a simple explanation of how the Doppler Effect is used to determine the speed and direction of moving object
Tuesday, February 22, 2011 at 6:47pm by Julia

physics
look in Wiki Google Doppler Effect, pick the wiki article.
Thursday, April 12, 2012 at 4:41pm by bobpursley

Scient
Doppler effect?
Wednesday, December 9, 2009 at 7:29pm by PsyDAG

physics
Use the approximate Doppler formula, for V/c <<1, which is (delta f)/f = V/c and see which V on the list is closest. The exact Doppler formula for light is bit more complicated. If you know it, use it. Usually, it is only taught when you study the theory of relativity. ...
Tuesday, May 4, 2010 at 2:28am by drwls

Physics-Could someone please help me?
Could someone provide me with a simple explanation of how the Doppler Effect is used to determine the speed and direction of moving object
Wednesday, February 23, 2011 at 12:50pm by Julia

DrBob222
The Doppler effect is a change in the ______of a sound. pitch
Saturday, April 5, 2008 at 2:53am by Jon

science
Look up Doppler effect. (Broken Link Removed)
Thursday, December 6, 2012 at 6:56pm by PsyDAG

Physical Science
How does a Doppler effect aid police in detecting speeding motorist?
Saturday, April 5, 2008 at 4:12pm by Rachel

physics
Yes, you have to use Doppler shift equations twice; first to get the frequency received and reflected by the insect in its own frame of reference,l then to consider the insect a moving source of that frequency, and calculate the still higher frequency received by the bat. ...
Wednesday, August 6, 2008 at 12:09am by drwls

Physics
A physics professor demonstrates the Doppler effect by tying a 600 Hz sound generator to a 1.0-m-long rope and whirling it around her head in a horizontal circle at 100 rpm. What are the highest and lowest frequencies heard by a student in the classroom? (Hint. Find the speed ...
Friday, February 26, 2010 at 11:49am by Anonymous

PHYSICS
It sounds like "Hey! Finish your test!" because when he made the noise he was not moving toward or away from you. He was directly over head and had at that instant no velocity component toward or away from you. Therefore no Doppler effect.
Saturday, March 19, 2011 at 10:16pm by Damon

physics
use the doppler formula, moving observer. I am not certain what is meant by the As you drive away... I suspect the total doppler change 147hz from high to low, meaning the max dopper change was half that on approaching, and half when going away.
Monday, January 28, 2013 at 6:51am by bobpursley

PHYSICS
im sure the answer ur getting is correct but ask yourself the units of the derived answer and compare it to the correct one.. using the doppler effect eq'n you can calculate the speed to be about 25 BUT ITS IN m/s which is EQUAL to 90km/h and its towards because the freqency ...
Monday, February 22, 2010 at 3:25pm by royalty

Physics doppler effect
A player passes a 0.600- basketball downcourt for a fast break. The ball leaves the player's hands with a speed of 8.10 and slows down to 7.20 at its highest point.How would doubling the ball's mass affect Explain.
Monday, May 16, 2011 at 7:41pm by Anonymous

Physics - Doppler Effect
The siren in an ambulance has a frequency (according to you) of 1100 hz as it moves towards you at a speed v. It then makes a u-turn and travels away from you with a speed v, and you hear a frequency of 950 hz. What is the final speed v of the siren?
Monday, March 28, 2011 at 9:06pm by J Velji

physics
Hmmmm. I am uncertain of what your text has presented, so let me try this... doppler=fo-f=2fo(v/vsound) for head on doppler, if one is observing at an angle, cosTheta should be a multiplier. .1khz=2*3.5M*v/vs now what is vs: near speed in water, 1496m/s . calculate v I get v ...
Saturday, October 19, 2013 at 9:31am by bobpursley

Physics doppler effect
F = ((V+Vr) / (V+Vs))*Fo = 491. ((340+0) / (340+Vs)))*523 = 491, 177820 / (340+Vs) = 491, 166,940 + 491Vs = 177,820, Vs = 22.2m/s = Speed of train.
Monday, May 16, 2011 at 7:41pm by Henry

physics
1)A wave created when two different waves meet will have an amplitude greater than the individual waves because of. A)destructive interference B)constructive interference C)antinodes D)a change in boundary I got B 2)If a wave has a period of .02 seconds and a speed of 4 m/s, ...
Sunday, April 6, 2008 at 5:09pm by Jon

Physics 20
The frequency change is called the Doppler shift. Calculate maximum pendulum speed V, which occurs at the bottom of the swing's motion. Conservation of Energy tells you that (1/2)V^2 = g * 0.386 m Solve for V. Then use the Doppler formula for the higher-pitched frequency at ...
Monday, July 13, 2009 at 3:44am by drwls

physics
The answer depends upon whether the bat is flying towards the wall or away from it (or parallel to it). The problem should have stated which it is. If flying away or towards the wall, there are TWO Doppler shifts involved. The wall "receives" and reflects a Doppler-shifted ...
Monday, August 4, 2008 at 11:04pm by drwls

physics
Use your doppler formula.
Friday, April 1, 2011 at 7:29pm by bobpursley

physics
doppler affect has nothing to do with destructive interference.
Friday, April 1, 2011 at 8:56pm by bobpursley

Physics
Doppler-effect. At source approaching f(observed) = [v/(v-u)] f(source), f(observed) = = [343/(343-12)] 395=409.3 Hz f(beat)= f(observed)=f(source)= =409.3-395=14.3 Hz
Monday, July 23, 2012 at 1:16pm by Elena

Physics
calculate the doppler frequency , then the difference in that and 75 is the beat.
Thursday, February 11, 2010 at 6:55pm by bobpursley

Physics doppler effect
A radar device emits microwaves with a frequency of 4.73E+9 Hz. When the waves are reflected from a van moving directly away from the emitter, the beat frequency between the source wave and the reflected wave is 751 beats per second. What is the speed of the van? (Note: ...
Monday, May 16, 2011 at 7:39pm by Joan

Physics
1. Yes, k = Mg/X = 681 N/m The frquency of oscillation does not depend upon how much farther the scale is pulled down. It is just f = [1/(2 pi)]*sqrt(k/m) 2. The frequency of the whistle from the oncoming train must be 521.1 Hz I don't have time to do your third question We ...
Thursday, December 9, 2010 at 5:19pm by drwls

Physics
Look up Doppler. This question is pretty elementary in that subject.
Sunday, July 10, 2011 at 7:29pm by bobpursley

Physics
Doppler shift f₀ = f/(1- v/u) = =880/(1-3.5/343)=889.07 Hz
Wednesday, January 2, 2013 at 9:03pm by Elena

physics Classical Mechanics
Hi, guys! What's about doppler shift? Can u tell me formulas?
Sunday, December 8, 2013 at 11:14am by Andy

Physics doppler effect
A person standing close to a railroad crossing hears the whistle of an approaching train. He notes that the pitch of the whistle drops as the train passes by and moves away from the crossing. The frequency of the approaching whistle is 523 Hz, and drops to 491 Hz after the ...
Monday, May 16, 2011 at 7:41pm by Joan

physics
'a weather station monitors a storm using a radar system. the radio wave pulse emitted is received back at the transmitter after 0.34 ms. the wavelength emitted was 5.6 cm and that received after reflection from the storm was 1 billionth of a meter longer. what information ...
Sunday, April 14, 2013 at 8:42am by mmk

Physics
2.88% times 343 = 9.8784 I don't understand this one b/c the doppler equation doesnt work
Monday, April 7, 2008 at 2:01pm by Jon

economics
When the price of summer tank tops falls and you buy more because they are relatively less expensive, this is called: a)elasticity effect b) deadweight loss effect c) income effect d) substitution effect
Monday, October 5, 2009 at 6:07pm by dave

earth science
The Doppler shift gives us information about whether objects are moving toward us or away from us. I searched Google under the key words "universe Doppler" to get these possible sources: http://imagine.gsfc.nasa.gov/YBA/cyg-X1-mass/Doppler.html http://www.pbs.org/wgbh/nova/...
Tuesday, June 2, 2009 at 4:00pm by PsyDAG

physics
The rest of it with the Doppler shift information is just to confuse the student. At your ear, you send 243 and get back 271.2
Saturday, March 31, 2012 at 9:14pm by Damon

Physics - Waves
Yes, on the first. But the second, the speaker is moving toward the wall, so it is an upward doppler pitch, and that exact frequency is reflected.
Sunday, February 1, 2009 at 7:03pm by bobpursley

Chemistry
How would you find that water is more acidic than ammonia with out using pka values? would you use resonance effect, inductive effect, hybridization effect, or element effect?
Friday, June 29, 2012 at 10:04am by UCI Student

physics
Except for doppler shifts due to relative motion of the galaxies, the spectroscopic wavelengths of atomic species seen in the spectra are the same.
Wednesday, July 27, 2011 at 1:11am by drwls

physics
Doppler effect Frequency (observed) f=c/λ=310⁸/5.8710⁻⁷=5.1110¹⁴ Hz Frequency (apparent) f´=c/λ´=310⁸/5.910⁻⁷=5.08510¹⁴ Hz f'=cf/(c+u) u=c{(f/f´)-1} =1.5310⁶ m/s
Friday, December 14, 2012 at 12:36pm by Elena

Physics
YEs, the effect of temperature on a gas is much greater than the effect on the metal tank.
Thursday, February 25, 2010 at 10:18am by bobpursley

physics
in low temperature physics,at joule thomson effect hydrogen does not show cooling effect at room temperature why?
Tuesday, February 23, 2010 at 1:24am by karthika

Physiology
Indicate the effect of the hormone on the response (increase, decrease, no effect)? 1.__________________ effect of secretion of insulin on blood glucose levels 2.__________________ effect of secretion of ADH on blood pressure 3.__________________ effect of secretion of ...
Wednesday, May 18, 2011 at 5:38pm by ivy

physics
A policeman with a very good ear and a good understanding of the Doppler effect stands on the shoulder of a freeway assisting a crew in a 40-mph work zone. He notices a car approaching that is honking its horn. As the car gets closer, the policeman hears the sound of the horn ...
Tuesday, November 15, 2011 at 6:31pm by maria

Physics
max velocity toward the listener occur on the opposite sides. veloicty of disk (source):radius*angular velociyin Radians/sec then use the doppler equation
Saturday, January 26, 2013 at 9:14pm by bobpursley

PHYSICS
Can you explain more of the theory side? with the double slit experiment, photoelectic effect, compton effect, reflection, refraction, stuff like that?
Sunday, March 7, 2010 at 3:14pm by Jordan

Comp 156
What is the definition of a cause and effect essay? Describe a cause and effect situation related to the effect of video games addiction on society
Monday, October 17, 2011 at 9:38am by Wonk

Comp 156
What is the definition of a cause and effect essay?Describe a cause and effect situation related to the effect of video games addiction on society.
Wednesday, October 19, 2011 at 1:57pm by Wonk

earth science
I would say red shift (Doppler effect makes distant star look lower frequency because moving away faster) but here is more: http://answers.yahoo.com/question/index?qid=20080111073209AAFvKP7
Friday, June 17, 2011 at 5:37pm by Damon

physics please help!!
This difference is due to the Doppler effect. If fo is emitted frequency, the observed frequency f is f=fo(c + v(r))/(c + v(s)), where c is the velocity of waves in the medium; v(r) is the velocity of the receiver relative to the medium; here v(r)= 0 v(s) is the velocity of ...
Tuesday, March 27, 2012 at 2:38am by Elena

Physics Classical Mechanics
Anyone can explain the rocket question and the doppler shift question? I got half of each question correct and dont know how to move on.
Saturday, December 7, 2013 at 6:51am by Anonymous

english
im getting confuse with the "effect" and "affect" can being shy fit in effect cause that what its in the topic "Eplain why you like or dislike something that has an effect on your life?" please help and thank you
Tuesday, November 16, 2010 at 7:26pm by unknown

effect or affect.
In both sentences the correct word is effect. Check the definition, especially the usage note near the bottom that discusses affect and effect. http://dictionary.reference.com/browse/effect
Wednesday, September 10, 2008 at 10:19am by Ms. Sue

physics
The Doppler effect occurs when a) a source of sound moves toward a listener b) a listener moves toward a source of sound c) a listener and a source of sound move away from each other d) a listener and a source of sound move toward each other. e) all of the above e--all of the ...
Monday, March 5, 2007 at 10:24pm by anonymous

physics
The frequency difference is 5.1 Hz (1 + V/a)*f - f = (V/a)*f = 5.1 a is the sound speed (340 m/s), and V = 14 m/s Solve for f. f = 124 Hz I did not use the exact formula for a doppler-shifted moving source, but this should be close enough.
Monday, April 9, 2012 at 10:37pm by drwls

Macroeconomics
What does crowding-out effect in a closed economy mean in simple terms? So...if there is 0 crowding-out effect, does it means that the investment/savings stays the same? Actually... I don't see how savings is directly affected by this effect... By the way, does this effect ...
Sunday, September 27, 2009 at 11:50am by Anonymous

lititure
what are the cause and effect of these things in brave new world? In fiction, as in life, events have causes and, in turn, become causes of subsequent events. Here are some events from Brave New World. Write a sentence that describes a major cause of each event and another ...
Tuesday, November 29, 2011 at 11:33am by amber

Physics
Ultrasound reflected from an oncoming bloodstream that is moving at 30 cm/s is mixed with the original frequency of 1.3 MHz to produce beats. What is the beat frequency? (Velocity of sound in blood = 1540 m/s.) Beat frequency = Hz HELP: This problem involves two Doppler shifts...
Thursday, December 9, 2010 at 3:34pm by Angel

government
when the prsident or his designee (usally secretary of states ) negotiates a treaty with a foreign country: A)the senate must approve the document for it to take effect B)both houses of congressmust approve the document for it to take effect. C) only the cabinent must approve ...
Wednesday, October 1, 2008 at 6:07pm by Anonymous

Living environment(please check thank YOU Ms.Sue)
Cause: When hydrochloric acid backs up into the esophagus Effect: called Acid Reflux Cause: As a result of the acidic ph in the stomach Effect: help break down food Cause: As the epigolottis covers the larynx, Effect: I NEED HELP WITH THIS Cause: when reverse peristalsis ...
Wednesday, March 14, 2012 at 5:26pm by Anna

physics
a.)At rest, a car's horn sounds at a frequency of 410 Hz. The horn is sounded while the car is moving down the street. A bicyclist moving in the same direction with one-third the car's speed hears a frequency of 381 Hz. What is the speed of the car? b.)Is the cyclist ahead of ...
Sunday, August 5, 2007 at 6:44pm by sanchi

Statistics
Cohen's conventions for the t test for independent means are approximately _____ for a small effect size, ____ for a medium effect size, and ______ for a large effect size? - .1, .3, .5 - 2, 4, 6 - .2, .5, .8 - 3, 6, 9
Sunday, October 11, 2009 at 10:12am by Trey

chemistry- can you check my answers?
can you please check my answers?? 9. For the following reaction delta H=2816 kj. 6 CO2(g) + 6 H2O(l) -> C6H12O6(s) + 6O2(g) how is the equilibrium yeild of C6H12O6(s)affected by each of the following? a) increasing pressure of CO2 increase decrease no effect Answer: ...
Wednesday, April 20, 2011 at 6:51pm by Lily

physics
OK, here are Doppler effect recipes for wave speed v, frequency Fs: Moving listener: Listener L moving toward Stationary source S with speed Vl (Vl negative if moving away) Fl = (v+Vl)/lambda = (v+Vl)/(v/Fs) or Fl = [ (v+Vl)/v ] Fs Moving source If the source is also moving: ...
Monday, April 7, 2008 at 12:22am by Damon

space
red shift when objects are going away from you, their frequency appears lower (Doppler effect). lower light frequency is red, higher is violet. when certain frequencies of light corresponding to known transitions in electron states of elements are shifted down in frequency (...
Monday, May 19, 2008 at 9:00pm by Damon

Physics
Two eagles fly directly toward one another, the first at 13 m/s and the second at 21 m/s. Both screech, the first emitting a frequency of 3200 Hz and the second, a frequency of 3800 Hz. What frequencies do they hear if the speed of sound is 345 m/s? (Tip: keep 4 significant ...
Monday, December 6, 2010 at 6:23pm by Cindy

Statistics
What is the consequence of a Type II error? a. concluding that a treatment has an effect when it really does b. concluding that a treatment has no effect when it really has no effect c. concluding that a treatment has no effect when it really does d. concluding that a ...
Friday, December 20, 2013 at 8:32am by Lyndyc

science
does the doppler shift provide complete information about the motion of a star? pleazzz help
Monday, March 30, 2009 at 9:06pm by mike

physics
Yes, you are right. I doubled the frequency shift twice. I am glad you caught my error. I did not use the fancier equation for Doppler shift that has both Vs and Vd in it, although it is more accurate, because the difference is small when the speed of the source or detector is...
Monday, April 7, 2008 at 12:07pm by drwls

health
Consider the impact of the following: The Aging population in the US. The ability to provide for Premature babies. The effect of the expansion of third party payers (folks who pay the bill are not the ones shopping for medical services). The effect of pressure on drug ...
Friday, July 3, 2009 at 10:23am by bobpursley

M/C
an owner investment of equipment into the business would: a)have no effect on liabilities b)have no effect on owner's equity c)have no effect on total assets d)increase net income i think its "a".
Thursday, May 27, 2010 at 12:31pm by Sat!

physics Classical Mechanics
Can some explain Part d of doppler shift. I used the following: f'= f*(1+speed of observer/speed of sound) f'=450*(1+20/340)=450*1.0588=476.46. This is my last chance. The wind blows toward the observer. Any ideas. Thanks.
Sunday, December 8, 2013 at 7:17am by Hil

Physics
A Doppler blood flow meter emits ultrasound at a frequency of 5.0 MHz. What is the beat frequency between the emitted waves and the waves reflected from blood cells moving away from the emitter at 0.15m/s? Assume that v_sound=1540m/s in blood.
Saturday, November 7, 2009 at 8:26pm by N.

english
Affect is always used as a verb. My sprained ankle will AFFECT my ability to play tennis. Effect is a noun. The EFFECT of the spilled perfume was everyone left the store. My studying for the test had the effect I desired; I passed. My studying affected my grade.
Saturday, September 15, 2007 at 1:01pm by GuruBlue

Economic
A Giffin good is not correctly described by which of the following? A)A Giffin good must be an inferior good. B)A Giffin good must be such that the income effect and the substitution effect move in opposite directions, and the income effect outweighs the substitution effect. C...
Sunday, April 11, 2010 at 9:38pm by Dina

economics
Because leisure is a normal good. If you cut income taxes, then the after-tax income for each hour worked goes up. This effect alone should cause a person to want to work more. This is the direct substitution effect labor-for-leisure. However, leisure is a desireable thing. ...
Monday, December 14, 2009 at 9:28pm by economyst

physics
The equation you have been given is actually not correct for light and radar guns, but it is close enough. For velocities much less than that of light, there is a frequency shift nthat is more easily written as just deltaf/f = 2*V/c The frequency shift is deltaf. The factor of...
Saturday, August 21, 2010 at 1:57pm by drwls

Physics
If centripetal force on an object in uniform circular motion is increased what is the effect on frequency of rotation if radius is constant. What is the effect on frequency and radius if both are free to vary. If veloicty increases, period is decreased, so frequency is increased.
Monday, June 18, 2007 at 7:44pm by Steve

Science 3
Which statement about stellar motion is incorrect? A.In general, the closer a star is, the more its proper motion. B.The radical velocity is measured by the Doppler shift. C.The transverse velocity is measured by the proper motion and distance. D.Like parallax, proper motion ...
Thursday, October 19, 2006 at 5:26pm by Liz

Math
Consider an antenna transmitting at 900 MHz. The reciever is traveling at a speed of 40km/h. Calculate its Doppler shift.
Wednesday, February 9, 2011 at 8:52pm by Josh

physics
Are you riding away from a reflecting surface and listening for the echo? If so, use the appropriate Doppler shift formula, with a received frequency of 20 kHz. Let the speed of sound be a. The answer will be approximately 2 V/a = 1.0kHz /20 kHz = 0.05 V = (1/2)*0.05*330 = 33 ...
Monday, March 4, 2013 at 1:28am by drwls

science
A salamander is a keystone species in a forest ecosystem with high biodiversity. This species migrates from woodland areas to a local stream to reproduce. If a road is built that cuts off the woodland areas from the stream, what effect will this have on the forest ecosystem? A...
Friday, December 13, 2013 at 2:41pm by Aaron

college physics
Competitive divers pull their limbs in and curl up their bodies when they do flips. Just before entering the water, they fully extend their limbs to enter straight down. Explain the effect of both actions on their angular velocities. Also explain the effect on their angular ...
Wednesday, March 26, 2014 at 1:48am by Mohanad

socials
what effect tv have on many individuals buying habits in post-war period? what effect it have today? it encourage people to buy more products. youngsters demanded sweetned cereals, barbie dolls, davy crocket hats, and many other advertised goods. effect it have today i think a...
Wednesday, December 7, 2011 at 4:46pm by Mohammad

physics
You need to review the Doppler shift equations. They should be in your textbook or class notes, and are easily found onlkne. You will also need to know the velocity of sound. Assume it is 340 m/s, which is 760 mph. The frequency heard at the station will be less than 1000 Hz. ...
Monday, April 25, 2011 at 1:00am by drwls

physics
deltaf = 2*fo*(deltaV)/c = 2*6*10^9*11/3*10^8 = 440 Hz The shift is toward higher frequency The factor of 2 takes into account frequency shifts of the incident and reflected wave. There is a more accurate formula for the Doppler shift of electromagnetic waves, but this is ...
Tuesday, March 27, 2012 at 1:47am by drwls

bogus typo
dang - that's "effect"! I hate it when people misuse affect and effect. :-(
Thursday, August 15, 2013 at 4:07pm by Steve

economics
describe the difference between the income effect and the substitution effect
Monday, July 13, 2009 at 5:12pm by AJ

history
cause: americans moved into spanish texas effect: what's an effect
Sunday, November 7, 2010 at 7:54pm by allen

Science
What ar the 4 componets that effect the earths climate? How does Carbon and Nitrate effect humans and the enviroment?
Wednesday, January 20, 2010 at 9:03pm by Ramandeep

SOCIAL STUDIES
an example of a part-whole effect question order effect is in the case which issue?
Monday, March 18, 2013 at 5:36pm by KEN

English 2
I have to write a cause and effect essay, and I'm writing about the cause for the popularity of fast food restaurants and the effect its had on people. I have plenty of causes listed, but for the effect I only have 2- Obesity, and jobs for people without diplomas. Can I get ...
Tuesday, September 28, 2010 at 3:16pm by mysterychicken

Physics
In one of the original Doppler experiments, one tuba was played on a moving platform car at a frequency of 75 Hz, and a second identical one was played on the same tone while at rest in the railway station. What beat frequency was heard if the train approached the station at a...
Thursday, February 11, 2010 at 6:55pm by Anonymous

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