An alarm clock is set to sound in 10.0 h. Att = 0, the clock is placed in a spaceship moving with a speed of 0.736 c (relative to Earth). What distance, as determined by an Earth observer, does the spaceship travel before the alarm clock sounds? (Hint: Keep track of your units!) answer in m

Two spaceships are moving along the line connecting them. One of the spaceships shoots a missile towards the other. The missile leaves the attacking spaceship at 0.955c and approaches the other at 0.755c. A u = 0.755 c u' = 0.955 c ▷ What is the relative velocity of the two spaceships? Express it as a ratio to the speed of light. Let the relative velocity of the spaceships be positive if they are approaching each other and negative if they are moving apart from one another.

As you pilot your space utility vehicle at a constant speed toward the moon, a race pilot flies past you in her spaceracer at a constant speed of 0.830 c, relative to you. At the instant the space-racer passes you, both of you start timers at zero. At the instant when you measure that the spaceracer has traveled 1.13 x 10°m past you, what does the race pilot read on her timer? O Ato = 0.253ms O Ato = 0.253s O Ato = 0.532s O Ato = 0.235s Ato = 0.533s %3D

John's rocket is flying towards the Earth at 0.8c. John uses an IR probe beam to image the atmosphere of the Earth. A detector on the Earth measures the speed of the incoming beam to be what ?   (Answer should have c in it)

A muon is created 60 km above the surface of the earth. In the earth’s frame, the muon is traveling directly downward at 0.9999c.a. In the earth’s frame of reference, how much time elapses between the muon’s creation and the time it reaches the surface?b. Use time dilation to determine, in the muon’s frame, how much time elapses between the muon’s creation and the time it reaches the surface.c. In the muon’s frame of reference, length contraction reduces the distance between the point at which it is created and the surface of the earth. What is this distance?d. The ratio of the distance you calculated in part c and the time you calculated in part b is a speed. Calculate this speed; what do you notice?

an aerospace is moving away from the earth at a velocity v = 0.6c to carry out a research. when the aircraft is at a distance of d = 5 x 10 ^ 8 km from the earth, a radio signal is sent to the aircraft from observers on earth. Count ita. How long does it take for the signal to reach the plane if calculated by researchers on earth and the crew on board?b. if an observer on earth measures the dimensions of the plane as long as 67 m, then how long is the plane measured by the crew on board?

Max observes a spaceship traveling toward him at 0.6c. He measures its length and finds that the spaceship is 41.4 m long. The ship brakes hard and skids to a stop on a nearby airstrip. Max remeasures the spaceship. What length does he now find?

A Martian leaves Mars in a spaceship that is heading to Venus. On the way, the spaceship passes earth with a speed v = 0.76c relative to it. Assume that the three planets do not move relative to each other during the trip. The distance between Mars and Venus is 1.20 × 1011 m, as measured by a person on earth. (a) What does the Martian measure for the distance between Mars and Venus? L = (b) What is the time of the trip (in seconds) as measured by the Martian? Δto =

Two rockets fly away from the Earth in opposite directions. Each rocket is moving at a speed of v = 0.83 c as seen from the Earth. a. How fast is rocket "B" moving as seen by the astronaut in rocket "A"? Express your answer as a decimal fraction of the speed of light. b. If the astronaut on rocket "A" measures a time interval of 60 minutes, how much time would they say goes by for the astronaut on rocket "B"? minutes c. Rocket "A" travels out from Earth at a speed of v = 0.83 c for a period of one year as measured on Earth, turns around, and then travels back to the Earth at the same speed for another Earth year. How much did the astronaut on the rocket age? years

A particle has a rest mass of 7.15×10−27 kg and a momentum of 5.75×10−18 kg·m/s. Determine the total relativistic energy ? of the particle. ?=   J Find the ratio of the particle's relativistic kinetic energy ? to its rest energy ?rest. ??rest=