A highway patrol officer uses a device that measures the speed of vehicles by bouncing radar off them and measuring the Doppler shift. The outgoing radar has a frequency of 95 GHz and the returning echo from a truck has a frequency 16.6 kHz higher. How fast in km/h is the truck moving? Note that there are two Doppler shifts in echoes. Be certain not to round off until the end of the problem, because the effect is small. Round your answer to two decimal places.

Q: In which of the following situations is the Doppler effect absent? a. The source and the observer…

A: The Doppler effect ( change in frequency) can be observed when a relative position change or…

Q: A spacecraft receding from the earth emits radio waves at a constant frequency of 10^9 Hz. If the…

A: Let the difference between the classical and relativistic frequency of the radio wave be 1 Hz. For…

Q: Earth's neighboring galaxy, the Andromeda Galaxy, is a distance of 2.54×107 light-years from Earth.…

A: Given, Distance, d = 2.54×107 light years  Time taken, t = 70 years

Q: A boat takes 3.00 hourshours to travel 50.0 kmkm down a river, then 6.10 hourshours to return. How…

A:

Q: In an electric furnace used for refining steel, the temperature is monitored by measuring the…

A:

Q: How fast must a rocket travel relative to the earth so that time in the rocket "slows down" to…

A: The time dilation factor is given as, According to the problem the time will be half, so the…

Q: A fast food restaurant uses a conveyor belt to send the burgers through a grilling machine. If the…

A: Given data: The length of the grilling machine is L = 1.1 m. The time taken to cook is t = 2.5 min.…

Q: It is said that Einstein, in his teenage years, asked the question, “What would I see in a mirror if…

A: The theory of relativity says that all experiments will give the same results in all inertial frames…

Q: How fast would a 6.0 m-long sports car have to be going past you in order for it to appear only 5.5…

A: Given data The actual length is, Lo=6.0 m The appeared length is L=5.5 m The appeared length by…

Q: In an Earth reference frame, a star is 44 light-years away. At what per cent of the speed of light…

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Q: Bianca is standing at x=600m. Firecracker 1, at the origin, and firecracker 2, at x=900m, explode…

A: Given data: Distance between Binaca and firecracker 1, d1= 600m Distance between Binaca and…

Q: You shine a beam of light with frequency 1/(450 [nm]) on a mirror that is moving with constant speed…

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Q: a Cepheid variable star is a star whose brightness alternately increases and decreases. For a…

A: Cepheid variable star is a star whose brightness alternately increases and decreases. The time…

Q: Compared to the length observed by a stationary observer, relativistic length or the length observed…

A: Length contraction is the relativistic phenomenon where the length of a moving object is measured to…

Q: A light source and an observer approach each other with relative speed v 0.9c, and the frequency…

A:

Q: According to quantum relativity, about how much of your mass is due to the relativistic mass of…

A: The relativistic mass is the mass that is assigned to the body in motion. Write the expression for…

Q: If a flashing light source moves toward you fast enough so that the duration between flashes is half…

A: It is given that a flashing light source is moving towards us such that the duration between the…

Q: Electrons are accelerated through a potential difference of 850 kVkV , so that their kinetic energy…

A: GivenK.E of electron = 8.5 x 105 ev                        = 0.85 mevBy using relativistic…

Q: Explain the temperature of gas with relativistic velocity?

A: Gas moves with relativistic speed. The overall speed of particles in the gas will be not the same as…

Q: Bianca is standing at x = 600 m. Firecracker 1, at the origin, and firecracker 2, at x = 900 m,…

A:

Q: A tuning fork has a frequency of 800 Hz and hence a period of 1.25 × 10 −3 s. If the tuning fork is…

A: The given values are, f=800 HzT=1.25×10-3 sv=0.690c

Q: Use the relativistic definitions of energy and momentum to show that E  = pc for any particle…

A: For a particle moving with speed of light, the momentum of the particle is given by p=mc…

Q: At the instant that a clock standing next to you reads t = 1.0 μs, you look at a second clock, 300 m…

A: The expression for find time taken by the light to reach the given distance is t=dv

Q: A man is driving his 4.5 m long automobile at 90 kph when the traffic signal in front of him changes…

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Q: Albert Einstein is pondering how to write his (soonto-be-famous) equation. He knows that energy E is…

A: To determine,The correct form of the equation of Energy by Elbert…

Q: Can classical physics be used to accurately describe a satellite moving at a speed of 7500 m/s?…

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Q: A highway patrol officer uses a device that measures the speed of vehicles by bouncing radar off…

A:

Q: How fast must a stick of length L=1.2m be moving if its length is measured by a stationary observer…

A:

Q: How fast would a proton have to be traveling in order to have the same momentum as a photon with a…

A:

Q: As a meterstick moves past you, your measurements show its momentum to be twice its classical…

A: Given: As a meterstick move past you, your measurements show its momentum to be twice its classical…

Q: Many galaxies have supermassive black holes at their centers. As material swirls around such a black…

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Q: What is the momentum of a 950-MeV proton (that is,its kinetic energy is 950 MeV)?

A: Total energy and momentum of a particle is related as- E2=p2c2+m02c4                     (1)where,E…

Q: Pls help ASAP

A: speed (v) = 2.7×108 msLifetime at rest (To) = 2.60×10-8 seconds

Q: The energy of a photon, whose momentum is 10 MeV/c, where c is the speed of light, is given by:  A)…

A: From the question it is given that momentum of photon: p = 10 MeVc Energy of a relativistic particle…

Q: Is the relativistic Doppler effect valid only for light waves? Can you think of another situation in…

A: The relativistic Doppler effect of light is the variation in the frequency of a light wave when the…

Q: The energy of a moving object is given by the equation of E=mv². What is the constant? What type of…

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Q: The electrons that illuminate the screen in the picture tube of yesterday’s TV sets travel at nearly…

A: Known values: Speed of light, c=3×108 m/s Speed of the electron, v=c4

Relativistic Energy and Momentum

According to classical physics, time flow is the same for every observer. But according to einstein's theory, time flow is different for different observers. The idea that time flow is not the same for all may sound strange because we may not experience this effect in everyday life. This effect is only observed when an object moves with some velocity comparable to the velocity of light. This velocity is termed relativistic velocity.