# Physics - Doppler Effect

75,910 results

### Doppler Effect

How fast must we be approaching a distant galaxy emitting yellow light (590nm) for it to appear green (520nm)? I believe it uses doppler effect, but how?

### Doppler Effect

Doppler Effect A car is travelling towards you at 16 m.s -1 sounding its hooter with a frequency of 320hz the. The velocity of sound is 330m.s-1 . what is the frequency of the sound that you will hear ?

### 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 ...

### physics

Explain the Doppler Effect?

### Doppler Effect

Doppler Effect a flying bat emits squeaks at a frequency of 85 khz if a stationary observer picks up the frequency of the squeaks as 80 khz is the bat moving towards or away from the listener ? determine the speed at which the bat is flying.

### 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 ...

### physics

how does the doppler effect relate to destructive interference?

Could someone provide me with a simple explanation of how the Doppler Effect is used to determine the speed and direction of moving object

Could someone provide me with a simple explanation of how the Doppler Effect is used to determine the speed and direction of moving object

### Physics

1. Give 3 reasons why it is important to know the nature and properties of waves. 2. Aside from crossing the street, identify one scenario in practicing road safety and explain how it is realted to Doppler Effect.

### DrBob222

The Doppler effect is a change in the ______of a sound. pitch

### Physics - Doppler Effect

How fast is a car moving and in what direction if the frequency of the horn drops from 900 Hz to 875 Hz, as heard by a stationary listener? The air temperature is 0oC. How to solve? I have no idea...

### Physical Science

How does a Doppler effect aid police in detecting speeding motorist?

### 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 ...

### science help pls pls

A star is observed from two positions of Earth in its orbit, in summer and winter. Which of these is the best method to calculate the approximate distance of the star from Earth? measure the parallax and use it in calculations measure the red shift of emitted light and use it ...

### science

Give five application of Doppler Effect in science

### 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?

### 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, ...

### physics, doppler effect

"A source of sound of frequency f0 moves horizontally at constant speed u in the x direction at a distance h above the ground. An observer is situated on the ground at the point x=0 (the source passes over this point at t=0). Show that the signal received at any time Tr at the...

### 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: ...

### 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 ...

### 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 ...

### 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 ...

### 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

### World Regional Studies/ Geography

In January 2000, cyanide is released to the Tisza River in Hungary. Effect 1: Effect 2: Water Pollution Countries develop industries. Effect 1: Effect 2: Polandâ€™s water in most rivers is unsafe to drink Rain washes fertilizers from fields into bodies of water The European ...

### 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?

### 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...

### 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 ...

### physics

in low temperature physics,at joule thomson effect hydrogen does not show cooling effect at room temperature why?

1. If a bat emits 10 sounds in 5 seconds, what is the frequency of the bat's vocal outbursts (rounded to first decimal place) My answer: 2.0 Hz 2.If one crest has a 3 cm amplitude and interacts with another pulse to produce a crest 8 cm high this demonstration" a) constructive...

### 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 ...

### science

give five application of Doppler effects

### 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 ...

### 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

### 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.

### 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 ...

### science

does the doppler shift provide complete information about the motion of a star? pleazzz help

### 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 ...

### 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 ...

### physics

A state trooper chases a speeder along a straight road; both vehicles move at 160 km/h. The siren on the trooper's vehicle produces sound at frequency of 500 Hz. What is the Doppler shift in the frequency heard by the speeder?

### 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 ...

### language arts

Label as Cause & Effect 1. (Effect) When dropped, cats land on their feet. (Cause) Cats are extremely agile creatures 2. (Cause) Few mammals can care for themselves at birth. (Effect) Most mammals are born immature 3. (Effect) The sun has a powerful gravitational force (Cause...

### 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 ...

### 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.

### Math

Consider an antenna transmitting at 900 MHz. The receiver is traveling at a speed of 40km/h. Calculate its Doppler shift.

### physics

an object of mass mf to fall a distance L, giving its energy to raise the bus of mass 0.50 kg. The focal point of the lab was the effect of an inclined plane (a ramp). What is the effect of a ramp on the force necessary to raise an object a vertical distance H? What is the ...

A sound of 7 kHz frequency is well within the normal hearing range of most people. True. False. << 2. Sound is a transverse compression wave. True. False.<< 3. The decibel level of a sound can have a negative value. True.<< False. 4. The Doppler effect occurs...

### physics - doppler effect

Two identical tuning forks can oscillate at 329.6 Hz. A person is located somewhere on the line between them. The speed of sound in the air is 343 m/s. Calculate the beat frequency as measured by this individual under the following conditions. (a) the listener is standing ...

### 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

### 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 ...

### 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: ...

### 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...

### 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".

### 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...

### 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.

### 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 ...

### Astronomy

1. What size are most exosolar planets that have been detected? A. Small like the moon B. Same size as earth C. More massive than Jupiter D. More massive than the sun 2. Which NASA space mission, launched in 2009, has the goal of determining if planets like earth are rare or ...

### Physics HELP

An ultrasound transducer used to measure the speed of blood cells is oriented at an angle of 45 degrees to the direction of the blood flow. if the frequency of the sound emitted by the transducer is 1.5 Mhz and the doppler shift is 268Hz, calculate the speed of blood cells. ...

### chemistry

This is from a "effect of pH on the solubility of Ca(OH)2" lab: If excess Ca(NO3)2 were present, what effect would it have on the solubility of Ca9OH)2? also, in a "effect of comlex ion formaiton on the solubility of NiCO3" lab": If HCl(aq) were added to the NiCo3 precipitate...

### science

2. 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...

### science

Our teacher wore a t-shirt with red lettering that read "if what you're reading is blue you're running to fast" and asked us to find out what it means. Any body have a clue, I was wondering about doppler.

### science (check!)

2. 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...

### physics

At the Indianapolis 500, you can measure the speed of cars just by listening to the difference in pitch of the engine noise between approaching and receding cars. Suppose the sound of a certain car drops by a factor of 2.40 as it goes by on the straightaway. How fast is it ...

### 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 ...

### 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...

### 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...

### Astronomy

Please check my answers 1. What size are most exosolar planets that have been detected? A. Small like the moon B. Same size as earth C. More massive than Jupiter D. More massive than the sun 2. Which NASA space mission, launched in 2009, has the goal of determining if planets ...

### Statistics

In an experiment, you measure the popularity of two brands of soft drinks (factor A), and for each brand you test males and females (factor B). The following table shows the main effect and cell means from the study: Factor A Level A1: Level A2: Brand X Brand Y Level B1: 14 23...

### Intro-Physics

Using a Doppler ultrasound, the velocity of blood flow in a vein or an artery can be measured. In a particular patient, the flow in a particular artery is found to be 30 cm/s at one point, and 20 cm/s at a point farther from the heart. If the two points in the artery are 50 cm...

### physics

A cardiologist uses an ultrasound scanner with an operating frequency of 3.5 MHz that can detect Doppler frequency shifts as small as 0.1 kHz. What is the smallest flow velocity detectable with this device? Two frequencies are given so I know I have to convert the units but im...

### economics

describe the difference between the income effect and the substitution effect

### history

cause: americans moved into spanish texas effect: what's an effect

### Physics-Astronomy

A high-velocity star HVS 1 is moving at 600 km/s, 0.2% speed of light. Assuming the HVS 1 is moving away from us, and that its velocity is oriented entirely along our line of sight, determine the Doppler shift of the Ha spectral line (6562.8 Angstrom) produced by this star. Is...

### 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 ...

### Science

What ar the 4 componets that effect the earths climate? How does Carbon and Nitrate effect humans and the enviroment?

### SOCIAL STUDIES

an example of a part-whole effect question order effect is in the case which issue?

### Greenhouse effect

im doin a project on da greenouse effect if you know any neat facts ill be happy to hear what u have 2 say

### Physics

How do observations of the photoelectric effect conflict with the predictions of classical physics?

What is the greenhouse effect and how does it effect the atosmphere?

### h

cause: lewis and clark explored the west effect: What's an effect?

### bio

What is the grandmother effect in humans? what is the grandfather effect?

### Statistics

In a study of the effect of a medical treatment, a simple random sample of 300 of the 500 participating patients was assigned to the treatment group; the remaining patients formed the control group. When the patients were assessed at the end of the study, favorable outcomes ...

### physics

if the angular speed of earth becomes 17times its present value what will be the 1.effect on a body on the equator of earth? it will be A. Heavier than present value B.lighter than present value C.weightless And also what is the reason? 2.a girl sitting on a swing stands up. ...

### physics

if the angular speed of earth becomes 17times its present value what will be the 1.effect on a body on the equator of earth? it will be A. Heavier than present value B.lighter than present value C.weightless And also what is the reason? 2.a girl sitting on a swing stands up. ...

### physics

1.will hall voltage be same for conductor and semiconductor in hall effect experiment? 2.can hall effect experiment be used for determining earth's magnetic field? 3.what is the importance of hall experiment? 4. can we use intrinsic semiconductor for hall experiment?

### Physics (urgent please)

Using the approximation formula for the doppler shift, fo=fs(1+Vrel/c), one finds that a source is moving aways at 0.60c. What result would the exact formula yield for the recession speed? I have not idea how to figure this one out. Help please. http://en.wikipedia.org/wiki/...

### English 10 HELP

I don't understand this at all! 1.)Supermodel Tyra Banks uses Smooth & Soft bath gel; you should, too! Faulty Cause and Effect Stereotype Red Herring Either/Or Thinking Bandwagon Testimonial 2.)Your answer is incorrect. You are a careless person. Faulty Cause and Effect ...

### Stats

Explain how to calculate margin of error. What effect does increasing your sample size have on the margin of error? What effect does it have on the confidence level? What effect does it have on the confidence interval?

### Stats

Explain how to calculate margin of error. What effect does increasing your sample size have on the margin of error? What effect does it have on the confidence level? What effect does it have on the confidence interval?

### Stats

Explain how to calculate margin of error. What effect does increasing your sample size have on the margin of error? What effect does it have on the confidence level? What effect does it have on the confidence interval?

### Stats

Explain how to calculate margin of error. What effect does increasing your sample size have on the margin of error? What effect does it have on the confidence level? What effect does it have on the confidence interval?

### Statistics

Explain how to calculate margin of error. What effect does increasing your sample size have on the margin of error? What effect does it have on the confidence level? What effect does it have on the confidence interval?

### Stats

Explain how to calculate margin of error. What effect does increasing your sample size have on the margin of error? What effect does it have on the confidence level? What effect does it have on the confidence interval?

### Spanish

Dr. Mario Jose Molina won the Nobel Prize in Chemistry for his work studying which problem? a. the ozone layer*** b. deforestation c. the El Nino effect d. the greenhouse effect

### Physics

Blood flow rates in the umbilical cord can be found by measuring the Doppler shift of the ultrasound signal reflected by the red blood cells. If the source emits a frequency f, what is the measured reflected frequency fR? Assume that all of the red blood cells move directly ...

### physics

A Foucault pendulum is designed to demonstrate the effect of the Earth's rotation. A Foucault pendulum displayed in a museum is typically quite long, making the effect easier to see. Consider a Foucault pendulum of length 16 m with a 109-kg brass bob. It is set to swing with ...

### macro

Assume that the utility function of a consumer is given by U = ln c1 + ln c2 The interest rate is given by 5% and the endowments are given by (y1, y2) = (100, 120). (a) Draw the budget constraint. (b) Calculate the consumption and saving in period 1. (c) Draw the indifference ...

### Biology

describe the effect of cyanide and arsenic on cellular repiration. Include the effect of these poisons on the electron transport chain. Be specific, and diagrams can be used to elucidate the process.

### Botany

Choose the correct option: The strongest evidence in favour of DNA as genetic material comes from - 1) Griffith effect 2)Conjugation 3)Taylor's experiment 4)Caim's effect

### space

Stars near the ______ should show the greatest Doppler shifts due to the earth's revolution. Why? Would it be stars near the ecliptic because it deals with the earth revolving and having motion.