1. A train is traveling along a straight, horizontal track at a constant speed t

Question

1. A train is traveling along a straight, horizontal track at a constant speed that is only slightly less than that of light. A warning light on the ground flashes once each second. An observer in the train measures the time between flashes to be
A. greater than one second. B. one second. C. less than one second.
2. What is the approximate value of the relativistic adjustment factor for a speed of 0.8 c?
A. 0.6 B. 1.2 C. 1.67 D. 1.8
3. A train is traveling along a straight, horizontal track at a constant speed that is only slightly less than that of light. An observer in the train determines that meter sticks on the ground are ____ meter sticks in the train.
A. shorter than B. longer than C. the same length as
4. A train is traveling along a straight, horizontal track at a constant speed that is only slightly less than that of light. An observer in the train claims that the engine came out of a tunnel at the same time as the caboose entered the tunnel. An observer on the ground claims that the engine came out of the tunnel ____ the caboose entered.
A. at the same time as B. before C. after
5. An electron is being accelerated by a constant force to nearly the speed of light. Which of the following is NOT true?
A. It experiences a constant acceleration. B. Its momentum increases at a constant rate. C. It can approach but not exceed the speed of light. D.Its total energy continually increases.
6. Imagine a spaceship that is far from any large masses so that the effects of gravity are negligible. This spaceship has a velocity of 10,000 km/s and an acceleration in the forward direction of 10 m/s2. If you release a ball in this ship, you will find that it falls to the floor with an acceleration ____ 10 m/s2.
A. less than B. equal to C. larger than
7. A student is asked to compare the masses of two objects. She holds one object in each hand and shakes them. The student is comparing
A. the inertial masses. B. the gravitational masses. C. both the inertial and gravitational masses.
8. To create “artificial gravity” in a cylindrical space station located in deep space, the station is rotated about its long axis. A ball released near the axis, “falls” to the wall of the space station. As it falls, the magnitude of its acceleration
A. increases B. decreases C. remains steady
9. A spaceship is resting on the surface of Mars where the acceleration due to gravity is 40% of that on Earth. If the astronauts think that they are accelerating through space, what would their acceleration be?
A. 4 m/s2 B. 8 m/s2 C. 10 m/s2 D. 40 m/s2
10. The general theory of relativity says that clocks run ____ as the gravitational force is increased.
A. at the same rate B. slower C. faster
11. The conclusions of the general theory of relativity
A. are true only for objects moving at very high speeds. B. have not yet been experimentally verified.
C. apply only to tiny atomic particles. D. are believed to be true for all motions of all objects.
12. Stamatis states “General relativity says that there is no experiment I can do in a closed room to tell whether my system is accelerating or not accelerating. This means that the path of a thrown ball should be the same in both systems.” Rachel answers, “The path of the ball could be different. General relativity only says that you can’t tell whether it’s different because the system is accelerating or because of the presence of some new gravitational force.” You should
A. agree entirely with Stamatis; Rachel’s argument is incorrect. B. agree with Stamatis, but Rachel makes some good points. C. agree equally with Stamatis and Rachel.
D. agree with Rachel, but Stamatis makes some good points. E. agree entirely with Rachel; Stamatis’ argument is incorrect.
1. A train is traveling along a straight, horizontal track at a constant speed that is only slightly less than that of light. A warning light on the ground flashes once each second. An observer in the train measures the time between flashes to be
A. greater than one second. B. one second. C. less than one second.
2. What is the approximate value of the relativistic adjustment factor for a speed of 0.8 c?
A. 0.6 B. 1.2 C. 1.67 D. 1.8
3. A train is traveling along a straight, horizontal track at a constant speed that is only slightly less than that of light. An observer in the train determines that meter sticks on the ground are ____ meter sticks in the train.
A. shorter than B. longer than C. the same length as
4. A train is traveling along a straight, horizontal track at a constant speed that is only slightly less than that of light. An observer in the train claims that the engine came out of a tunnel at the same time as the caboose entered the tunnel. An observer on the ground claims that the engine came out of the tunnel ____ the caboose entered.
A. at the same time as B. before C. after
5. An electron is being accelerated by a constant force to nearly the speed of light. Which of the following is NOT true?
A. It experiences a constant acceleration. B. Its momentum increases at a constant rate. C. It can approach but not exceed the speed of light. D.Its total energy continually increases.
6. Imagine a spaceship that is far from any large masses so that the effects of gravity are negligible. This spaceship has a velocity of 10,000 km/s and an acceleration in the forward direction of 10 m/s2. If you release a ball in this ship, you will find that it falls to the floor with an acceleration ____ 10 m/s2.
A. less than B. equal to C. larger than
7. A student is asked to compare the masses of two objects. She holds one object in each hand and shakes them. The student is comparing
A. the inertial masses. B. the gravitational masses. C. both the inertial and gravitational masses.
8. To create “artificial gravity” in a cylindrical space station located in deep space, the station is rotated about its long axis. A ball released near the axis, “falls” to the wall of the space station. As it falls, the magnitude of its acceleration
A. increases B. decreases C. remains steady
9. A spaceship is resting on the surface of Mars where the acceleration due to gravity is 40% of that on Earth. If the astronauts think that they are accelerating through space, what would their acceleration be?
A. 4 m/s2 B. 8 m/s2 C. 10 m/s2 D. 40 m/s2
10. The general theory of relativity says that clocks run ____ as the gravitational force is increased.
A. at the same rate B. slower C. faster
11. The conclusions of the general theory of relativity
A. are true only for objects moving at very high speeds. B. have not yet been experimentally verified.
C. apply only to tiny atomic particles. D. are believed to be true for all motions of all objects.
12. Stamatis states “General relativity says that there is no experiment I can do in a closed room to tell whether my system is accelerating or not accelerating. This means that the path of a thrown ball should be the same in both systems.” Rachel answers, “The path of the ball could be different. General relativity only says that you can’t tell whether it’s different because the system is accelerating or because of the presence of some new gravitational force.” You should
A. agree entirely with Stamatis; Rachel’s argument is incorrect. B. agree with Stamatis, but Rachel makes some good points. C. agree equally with Stamatis and Rachel.
D. agree with Rachel, but Stamatis makes some good points. E. agree entirely with Rachel; Stamatis’ argument is incorrect.
1. A train is traveling along a straight, horizontal track at a constant speed that is only slightly less than that of light. A warning light on the ground flashes once each second. An observer in the train measures the time between flashes to be
A. greater than one second. B. one second. C. less than one second.
2. What is the approximate value of the relativistic adjustment factor for a speed of 0.8 c?
A. 0.6 B. 1.2 C. 1.67 D. 1.8
3. A train is traveling along a straight, horizontal track at a constant speed that is only slightly less than that of light. An observer in the train determines that meter sticks on the ground are ____ meter sticks in the train.
A. shorter than B. longer than C. the same length as
4. A train is traveling along a straight, horizontal track at a constant speed that is only slightly less than that of light. An observer in the train claims that the engine came out of a tunnel at the same time as the caboose entered the tunnel. An observer on the ground claims that the engine came out of the tunnel ____ the caboose entered.
A. at the same time as B. before C. after
5. An electron is being accelerated by a constant force to nearly the speed of light. Which of the following is NOT true?
A. It experiences a constant acceleration. B. Its momentum increases at a constant rate. C. It can approach but not exceed the speed of light. D.Its total energy continually increases.
6. Imagine a spaceship that is far from any large masses so that the effects of gravity are negligible. This spaceship has a velocity of 10,000 km/s and an acceleration in the forward direction of 10 m/s2. If you release a ball in this ship, you will find that it falls to the floor with an acceleration ____ 10 m/s2.
A. less than B. equal to C. larger than
7. A student is asked to compare the masses of two objects. She holds one object in each hand and shakes them. The student is comparing
A. the inertial masses. B. the gravitational masses. C. both the inertial and gravitational masses.
8. To create “artificial gravity” in a cylindrical space station located in deep space, the station is rotated about its long axis. A ball released near the axis, “falls” to the wall of the space station. As it falls, the magnitude of its acceleration
A. increases B. decreases C. remains steady
9. A spaceship is resting on the surface of Mars where the acceleration due to gravity is 40% of that on Earth. If the astronauts think that they are accelerating through space, what would their acceleration be?
A. 4 m/s2 B. 8 m/s2 C. 10 m/s2 D. 40 m/s2
10. The general theory of relativity says that clocks run ____ as the gravitational force is increased.
A. at the same rate B. slower C. faster
11. The conclusions of the general theory of relativity
A. are true only for objects moving at very high speeds. B. have not yet been experimentally verified.
C. apply only to tiny atomic particles. D. are believed to be true for all motions of all objects.
12. Stamatis states “General relativity says that there is no experiment I can do in a closed room to tell whether my system is accelerating or not accelerating. This means that the path of a thrown ball should be the same in both systems.” Rachel answers, “The path of the ball could be different. General relativity only says that you can’t tell whether it’s different because the system is accelerating or because of the presence of some new gravitational force.” You should
A. agree entirely with Stamatis; Rachel’s argument is incorrect. B. agree with Stamatis, but Rachel makes some good points. C. agree equally with Stamatis and Rachel.
D. agree with Rachel, but Stamatis makes some good points. E. agree entirely with Rachel; Stamatis’ argument is incorrect.

Explanation / Answer

1) greater than one second

2) Y = 1 / sqrt(1 - v^2/c^2) = 1 / sqrt(1 - 0.8^2/1) = 1 / 0.6 = 1.67

3) shorter than

4) before

5) It experiences a constant acceleration is not true. beacuse it experiences a decreasing acceleration.

6) less than

7) the inertial masses

8) decreases

9) 4 m/s^2

10) faster

11) are true only for objects moving at very high speeds

12) agree entirely with Stamatis; Rachel’s argument is incorrect

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