
A spaceship is moving away from Earth at speed 0.20c. A source on the rear of...
A distant galaxy is moving away from Earth at a speed of 70,000 km/s. If a star in that galaxy emits light at a wavelength of 450 nm, what is the wavelength of that light when it reaches Earth? Speed of light c= 300,000 km/s.
a spaceship of proper length 50 m is moving away from the earth at a speed of .8c . according to the observes in the ship , their journey takes 6.0 hours . according to observers on earth , what is the length of the ship and how long does the journey take ?
A spaceship at rest on the earth has a length of 120m and a mass of 16,000kg. Then the spaceship begins to move away from the earth at 3/4 speed of light. If the spaceship sends out a second ship away from the earth on what observers on the spaceship think is 1/2 speed of light, how fast do the observers on earth think the second ship is moving? If the spaceship sends out a second ship toward the earth...
Observer A on Earth sees spaceship B moving at speed v = 0.600c0 away from Earth and spaceship C moving at the same speed in the opposite direction. Observer A determines that both ships simultaneously sent out a radio signal at 12:00:00 noon and another signal at 12:05:00 p.m., making the time interval A measures between the emission of the signals from each ship ?tA = 5.00 min . Let ?tBB denote the time interval measured on ship B between...
05. Light from a spaceship is observed, then the spaceship moves directly away from the observer at high speed while still emitting the light. As a result, the light seen by the observer has: A. a higher frequency and a longer wavelength than before B. a lower frequency and a shorter wavelength than before C. a higher frequency and a shorter wavelength than before D. a lower frequency and a longer wavelength than before E. the same frequency and wavelength...
A spaceship from a friendly extra-galactic planet flies toward Earth at 0.201 of the speed of light and shines a powerful laser beam toward Earth to signal its approach. The emitted wavelength of the laser light is 699 nm. Find the light's observed wavelength on Earth Number nm
The spaceship Enterprise 1 is moving directly away from earth at a velocity that an earth-based observer measures to be +0.69c. A sister ship, Enterprise 2, is ahead of Enterprise 1 and is also moving directly away from earth along the same line. The veolcity of Enterprise 2 relative to Enterprise 1 is +0.45c. What is the velocity of Enterprise 2, (in terms of c) as measured by the earth-based observer?
Most of the galaxies in the universe are observed to be moving away from Earth. Suppose a particular galaxy emits orange light with a frequency of 5.000×1014Hz. If the galaxy is receding from Earth with a speed of 4875 km/s, what is the frequency of the light when it reaches Earth?
Most of the galaxies in the universe are observed to be moving away from Earth. Suppose a particular galaxy emits orange light with a frequency of 5.000×1014Hz. If the galaxy is receding from Earth with a speed of 5000 km/s, what is the frequency of the light when it reaches Earth?
A spaceship and an asteroid are moving in the same direction away from Earth with speeds of 0.69c and 0.35c, respectively. What is the relative speed between the spaceship and the asteroid?