Light travels a certain distance in, say, 20,000 years. How is it possible that an astronaut, traveling slower than light, could go as far in 20 years of her life as light travels in 20,000 years?

Q: If time travel exists in the future does it mean it exists now?

A: This say impossible that time travel exist or not now because some countries work on it secretly.…

Q: Calculate the number of miles in a light-year, using 1.86  105 mi/s as the speed of light. (Hint:…

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Q: s the pressure exerted on the wal

A: Period of time Δt = 9.00S Number of molecules N = 5x1023 molecules  Area A = 7.2 Cm2 =7.2x10-4 m…

Q: The New Horizons probe is currently traveling at 14.1 km/s. How long would it take to reach Proxima…

A: speed of probe (v) = 14.1 kms= 14100 msdistance (d) = 4 light years

Q: Suppose we find an Earth-like planet around one of our nearest stellar neighbors, Alpha Centauri…

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Q: A satellite operates at an altitude of 20,250 km and uses communication frequencies of 1,535.20 MHz.…

A: The problem is based on the concept of gravitational redshift: The change in the frequency is given…

Q: Redshift: A distant quasars has a redshift of z = 4.5. This means that the wavelength of spectral…

A: Given wavelength (λ) = 410 nm ∆λ = (2255 - 410)nm =1845 nm

Q: If the speed of light is given as  299,792,458 meters per second and the wavelength is 478 nm.  what…

A: Given velocity of light c = 299,792,458 m/s wavelength of light λ= 478 nm we have to calculate the…

Q: If an object starts traveling at 15 meters per second and deaccelerating at 2 meters per second…

A: Initial velocity,

Q: Your spaceship launches in June 2020 and returns back to Earth directly aer arriving at Sirius. (a)…

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Q: Light is without mass, so how can gravity have an effect on light?

A: Einstein’s general theory of relativity explains gravity as distortion of four dimensional spacetime…

Q: if you walk at 1km/hr down the aisle of a train that moves at 60km/hr, what is your speed relative…

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Q: 1 million kilometers can be expressed in scientific notation as:  10x10^6 km  10x10^-6 km none of…

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Q: how far light would travel in a week on the “cosmic calendar”?

A: To find : How far does the light travel in 1 week of cosmic calender

Q: The speed of light is the same for all observors.  True  False

A: Ans. True

Q: What does Special Relativity tell us about physics in Nature? Pick those that are true.     That…

A: The options that are true about Special Relativity tell us about physics in Nature are: That…

Q: Hannah takes an exotic cruise on a spaceship that travels at 92% of the speed of light. As measured…

A: In the special theory of relativity, time dilation is the difference in elapsed time for an event…

Q: What do we call the “stretching out” of time?

A: The stretching out of time is called as time dilation.

Q: How long would it take a space craft that was traveling at a speed of 61,079 km/hr to travel a…

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Q: An astronaut launches from Earth on a rocket in 2017. They return in 2032 having aged 3 years. How…

A: Year of launch of rocket = 2017Year of return of rocket = 2032Number of years passed on earth =…

Q: Why do you think the development of Newtonian mechanics preceded the more refined relativistic…

A: The development of Newtonian mechanics preceded the more refined relativistic mechanics by so many…

Q: If a space ship traveling at 1/5 the speed of light travels to a star system 6 light years away How…

A: Speed of spacecraft is ; here  is speed of light.Distance is Note:Speed of light is Find:Time taken…

Q: One light year is the distance traveled by light in a year. Convert one light year to meter using…

A: speed of light (v) = 3 ×108 mstime (t) = 1 year

Q: 5. Most of the time we can ignore Einstein's theory and use Newton's laws since in our everyday…

A: We are given distance travelled and speed of muon. We first find the time taken to reach the sea…

Q: Why do you believe Newtonian mechanics took so long to evolve compared to more sophisticated…

A: There are two main reasons for this: Was A) Classical/Newtonian mechanics started developing in…

Q: As measured on Earth the star Fomalhaut is 25.1 light years away. As measured by the crew of a…

A: The difference in time measured by two clocks due to their relative motion or position is called…

Q: If you were moving at 4 m/s and then accelerated at 0.5 m/s squared for 10 s, how much distance…

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Q: In 4 – 7 sentences of your own words, describe one (1) consequence of Einstein’s general theory of…

A: Einstein’s general theory of relativity was developed in  1905. According to this theory, the…

Q: why is it reasonable to suspect that travel between stars is nearly impossible?

A: Somethings are impossible because they violate fundamental laws of nature. Today, we belive that…

Q: Why do we think that nothing, other than light, can travel faster than the speed of light?

A: According to the Einstein’s theory of relativity nothing can travel faster than light.

Q: Why do you believe Newtonian mechanics took so long to evolve compared to more sophisticated…

A: Newtonian mechanics: When the speed of a body is substantially slower than the speed of light,…

Q: The twin paradox doesn't seem to make logical sense according to special relativity. This is…

A: According to twin paradox theory, one twin moves at speed of light and hence his frame of reference…

Q: Explain why the speed of light is the maximum attainable

A: Hi , please find the answer

Q: What is constant in Einstein’s second postulate?

A: The second postulate of special relativity is “Speed of light is same in every inertia frame of…

Q: Relativistic energy question: Consider a thought experiment. You place an expanded balloon of air on…

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Q: If you are in a spaceship, traveling at 90% the speed of light, how much time will pass for you? A:…

A: Find the time of the person will pass to the spaceship.