How fast is a light year?

Q: A rectangular billboard in space has the dimensions 10 meters by 20 meters. How fast and in what…

A: Length contraction occurs only along the direction of motion. It needs 20 m side to appear as the 10…

Q: How many miles in a light year?

A: Light year is the distance travelled by light in one year.  We know speed of light is equal to 3x108…

Q: Using a single dimensional equation, estimate the number of steps it would take a person with a step…

A: Given data: -  The step length of a person is l = 2.65 ft. The distance of Alpha Centauri from the…

Q: What is special about the ratio of the distance traveled by a flash of light and the time the light…

A: Given: distance and time

Q: An imperial tie-fighter spaceship is 25 parsecs south of a rebel x-wing ship. If the tie-fighter…

A: Given that: d= 25 parsec r=7.72 parsec θ=72° Let the bearing should be ϕ to intercept at an angle…

Q: The ratio of circumference to diameter for all circles is

A: Write the expression of the circumference of a circle in terms of its radius as: The formula for…

Q: Making a turn, a plane flies 2 km on a circular path of a radius of 3.6 km. Through what angle does…

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Q: How many light years are in one parsec? (Use at least two significant figures)

A: Distance is Note:Convert the distance in units of .

Q: The radius of the earth is 6400 Km and the height of a person is 1.7m, how high can you stand to see…

A: Given: Radius of earth, RE=6400 km Height of person, 1.7m To Find: Height to see the Horizon

Q: If the speed of light is given as 299.792,458 meters per second and the wavelength is 481 nm. what…

A: Formula of frequency is as follows; f=vλ…

Q: The speed of light in space is 3.00 x 108 m/s. The time for light from the Sun to reach Earth is 8…

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Q: If we view a star now, and then view it again 6 months later, our position will have changed by the…

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Q: The Hydra galaxy is moving away from Earth at 6 x 10^7 m/s. What fraction of the speed of light is…

A: Given, the velocity of Hydra Galaxy = 6×107m/s                               Velocity of light =…

Q: A star is 80 light years from Earth. How fast does a spacecraft have to be for the journey to last…

A: The objective of this question is to find out the speed of a spacecraft that would allow an…

Q: The radius of the Earth is 6,400 km. What speed and direction would you have to travel along the…

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Q: The answer is incorrect, would there be another way for figuring this out? Thank you.

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Q: I'm having trouble completing the problem I've attached a picture of below. I was able to find the…

A: Dear student The average speed is defined as total distance per unit time. The avergae velocity is…

Q: Explain why the light‑year has the dimension of length

A: The speed of light in vacuum is,