A spaceship is moving away from Earth at speed 0.20c. A source on the rear of...
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?
A spaceship moves at a speed of 0.85 c away from the Earth. It shoots a torpedo toward the Earth at a speed of 0.8 c relative to the ship. The defenders of Earth respond by blasting high energy x-rays at the torpedo in an attempt to destroy it. What is the velocity of the x-rays relative to the Earth? -0.156 c 0.156 c 0.8 c 0.85 c c
suppose a spaceship heading directly away from the Earth at 0.75c can shoot a canister at 0.65c relative to the ship. Take the direction of motion towards Earth as positive. v1= 0.75 c v2= 0.65 c a) If the canister is shot directly at Earth, what is the ratio of its velocity, as measured on Earth, to the speed of light? (units for answer in mu/c=...) b) What about if it is shot directly away from the Earth (again, relative...
Spaceship A moves away from Earth at a speed vA = 0.776c (see figure). Spaceship B pursues at a speed vB = 0.891c relative to Earth. Observers on Earth see B overtaking A at a relative speed of 0.115c. With what speed is B overtaking A as seen by the crew of spaceship B?
Spaceship A moves away from Earth at a speed vA = 0.728c (see figure). Spaceship B pursues at a speed vB = 0.981c relative to Earth. Observers on Earth see B overtaking A at a relative speed of 0.253c. With what speed is B overtaking A as seen by the crew of spaceship B?