Question 1

Calculate the amount of energy needed to accelerate an electron from 0.888 c to 0.991 c. Express your answer in MeV. The rest mass energy of an electron is 0.511 MeV.

Accepted Answer

A)   2.71 MeV
B)   1.90 MeV
C)   5.69 MeV
D)   4.61 MeVE) All of the above
F) B) and C)

Question 2

A spaceship enters the solar system moving toward the sun at a constant speed relative to the sun. By its own clock, the time elapsed between the time it crosses the orbit of Jupiter and the time it crosses the orbit of Mars is  50.050.050.0  minutes. As measured in the coordinate system of the sun, how Iong did it take for the spaceship to travel that distance? The radius of the orbit of Jupiter is  778×778 	imes778×   109 m10 ^ { 9 } \mathrm {~m}109 m , and that of the orbit of Mars is  228×109 m228 	imes 10 ^ { 9 } \mathrm {~m}228×109 m .

Accepted Answer

A)    58.658.658.6  minutes
B)    30.030.030.0  minutes
C)    95.895.895.8  minutes
D)    69.869.869.8  minutes
E)    43.643.643.6  minutes F) A) and D)
G) A) and E)

Question 3

An astronaut on a spaceship moving at 0.927c says that the trip between two stationary stars took 4.26 y. How long does this journey appear to take to someone in the rest frame of the two stars?

Accepted Answer

A)   1.60 y
B)   2.30 y
C)   12.6 y
D)   11.4 yE) B) and C)
F) C) and D)

Question 4

In an "atom smasher," two particles collide head on at relativistic speeds. If the velocity of the first particle is 0.741c to the left, and the velocity of the second particle is 0.543c to the right (both as
Measured in the lab rest frame) , how fast are the particles moving with respect to each other?

Accepted Answer

A)   0.834c
B)   0.934c
C)   0.916c
D)   1.284cE) All of the above
F) C) and D)

Question 5

A really high-speed train moves in a direction parallel to its length with a speed that approaches the speed of light. The height of the train, as measured by a stationary observer on the ground,

Accepted Answer

A)   increases slightly.
B)   decreases slightly.
C)   approaches infinity.
D)   approaches zero.
E)   does not change due to the motion.F) A) and D)
G) A) and B)

Question 6

A spaceship with a constant speed of 0.800c relative to Earth travels to a star that is 4.30 light-years from Earth. How much time for this trip would elapse on a clock on board the spaceship?

Accepted Answer

A)   5.38 y
B)   3.23 y
C)   5.15 y
D)   4.40 yE) B) and D)
F) A) and B)

Exam 26: The Special Theory of Relativity

Correct Answer
verified

A spaceship with a constant speed of 0.800c relative to Earth travels to a star that is 4.30 light-years from Earth. How much time for this trip would elapse on a clock on board the spaceship?

Correct Answer
verified

An astronaut on a spaceship moving at 0.927c says that the trip between two stationary stars took 4.26 y. How long does this journey appear to take to someone in the rest frame of the two stars?

Correct Answer
verified

Calculate the amount of energy needed to accelerate an electron from 0.888 c to 0.991 c. Express your answer in MeV. The rest mass energy of an electron is 0.511 MeV.

Correct Answer
verified

Correct Answer
verified

A really high-speed train moves in a direction parallel to its length with a speed that approaches the speed of light. The height of the train, as measured by a stationary observer on the ground,

Correct Answer
verified

Exam 26: The Special Theory of Relativity

Correct AnswerverifiedShow Answer

A spaceship with a constant speed of 0.800c relative to Earth travels to a star that is 4.30 light-years from Earth. How much time for this trip would elapse on a clock on board the spaceship?

Correct AnswerverifiedShow Answer

An astronaut on a spaceship moving at 0.927c says that the trip between two stationary stars took 4.26 y. How long does this journey appear to take to someone in the rest frame of the two stars?

Correct AnswerverifiedShow Answer

Calculate the amount of energy needed to accelerate an electron from 0.888 c to 0.991 c. Express your answer in MeV. The rest mass energy of an electron is 0.511 MeV.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A really high-speed train moves in a direction parallel to its length with a speed that approaches the speed of light. The height of the train, as measured by a stationary observer on the ground,

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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