Near the center of our galaxy, hydrogen gas is moving directly away from us in its orbit about a black hole. We receive electromagnetic radiation of wavelength 1888 nm and know that it was 1875 nm when emitted by the hydrogen gas. What is the ratio of the speed of the gas to the speed of light?

Q: You encounter a moving walkway that is 75 mm long and has a speed of 1.9 m/sm/s relative to the…

A: Given value--- speed of walkway = 1.9 m/s. distance = 75 m. We have to find --- How long would it…

Q: One of the primary goals of the Kepler space telescope is to search for earth like planets. Data…

A: When bodies travel at relativistic speeds, phenomenon, such as time dilation and length…

Q: The frequency of light emitted from hydrogen present in the Andromeda galaxy has been found to be…

A: It is given that the frequency of light emitted from hydrogen present Andromeda is found to be…

Q: Near the center of our galaxy, hydrogen gas is moving directly away from us in its orbit about a…

A: The expression for the wavelength of radiation observer by the observer on Earth,

Q: (a) In communicating with an astronaut on the moon, 3.8  108 m from earth, what is the minimum time…

A: (a) Given Data: The distance of moon from earth is: d=3.8×108 m The speed of light is: c=3×108 m/s

Q: Your spaceship zips past a spherical asteroid at 0.80c. What is the shape of the asteroid from your…

A: Shape of the asteroid from your point of view

Q: Proxima Centauri, the closest star to our Solar System, is still at an average distance of…

A: The time taken by the light to reach the Earth from Proxima Centauri is given by,…

Q: Galaxies at the furthest reaches of the universe are moving away from us at speeds greater than…

A: About speed of light .

Q: A star is 15.0 light - years (ly) from Earth. (a) At what constant speed must a spacecraft travel on…

A: a)The gamma factor is given by

Q: A spacecraft transmits a microwave signal with a wavelength of 1.25 cm. If the wavelength of the…

A: Given: The wavelength of microwave signal=λ0=1.25 cm The wavelength of signal received on earth…

Q: The frequency of light emitted from hydrogen present in the Andromeda galaxy has been found to be…

A:

Q: (a) What is the momentum (in kg · m/s) of a proton moving at 0.716c?  kg · m/s (b) At what speed (in…

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

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Q: A rocket cruises past a laboratory at 0.400×106m/s in the positive x-direction just as a proton is…

A: Write the expression for speed of the proton in laboratory frame .

Q: A spaceship goes past a planet at a speed of 0.80c relative to the planet. An observer on the planet…

A:

Q: An interstellar space probe is launched from Earth. After a brief period of acceleration, it moves…

A: The expression of time for the given case where the batteries on the space probe last as measured by…

Q: (a) All but the closest galaxies are receding from our own Milky Way Galaxy. If a galaxy 12.0×109 ly…

A: (a)   The velocity by which the spaceship should be launched to approach the galaxy at 0.990c can be…

Q: Electromagnetic radiation from a star is observed with an earth-based telescope. The star is moving…

A: Option A is correct 4.39×1014Hz

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

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Q: The car is moving at 10 m/s relative to Bill. How fast does Amy see the car as moving?A. 5 m/s…

A:

Q: A cosmic ray travels 60 km through the earth’s atmosphere in 400 μs, as measured by experimenters on…

A: The velocity of cosmic ray is, v=dtv=60×103 m400×10-6 sv=1.5×108 m/s

Q: An observer on Earth sees Planet X to be stationary and also sees a rocket travel from Earth toward…

A: When an object travels with speed comparable to the speed of light, then the classical velocity…

Q: Astronomers determine that a particular star in our galaxy is moving toward Earth at a speed of…

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Q: A person walking at 5 km/hr along a train that moves 150 km/hr E. What is the velocity of the person…

A:

Q: Electromagnetic radiation from a star is observed with an earth-based telescope. The star is moving…

A: This problem involves the Doppler effect for electromagnetic waves.

Q: A cylindrical spaceship of length 35.0 m and diameter 8.35 m is traveling in the direction of its…

A: Given :-   L = 35.0 m  d = 8.35 m V = 2.44 × 10 8  We know C = 3 × 10 8   For part c given  d = 10…

Q: In what time interval does an electron in a cathode-ray tube accelerating uniformly from 2.00 x 104…

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Q: Suppose a celestial body is moving away from the Earth at a speed of 0.325c. It emits radio waves…

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Q: The star of a distant solar system explodes as a supernova. At the moment of the explosion, an…

A: The time taken by the spaceship to reach the speed of 25000 km/s or 25000000 m/s is  t=va where t is…

Q: A spacecraft transmits a microwave signal with a wavelength of 1.25 cm.  If the wavelength of the…

A: When the source is moving away from the Earth then the wavelength is given by: λ'=1+vscλ    ...(1)…

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

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Q: An elementary particle produced in a laboratory experiment travels 0.230 mm through the lab at a…

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Q: According to the theory of relativity, when moving objects are measured from a stationary frame,…

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Q: What must be the speed of a moving train so that an observer on the train sees a meter stick as 50.0…

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Q: Our Milky Way galaxy is 100,000 ly in diameter. A spaceship crossing the galaxy measures the…

A: Given: A milky way is 100000 ly in Diameter. So L0=100000 A spaceship crossing the galaxy measures…

Q: An out-of-control alien spacecraft is diving into a star at a speed of 1.0 x 108 m/s. At what speed,…

A: According to the Einstein principle of relativity the speed of the light will be always same in all…

Q: If you consider a blinking light source that is receding an observer, what happens to its speed? A.…

A: Let a blinking source of light is receding away from an observer at a relative speed "v" with…

Q: Imagine that the entire Sun collapses to a sphere of radius R g such that the work required to…

A: Given the work done is equal to its rest mass energy.

Q: One of the primary goals of the Kepler space telescope is to search for Earth-like planets. Data…

A: