76. A spaceship is moving at 0.8c relative to an observer on Earth. The spaceship's passengers measure a distance of 200 meters between two points. What is the distance between the points according to the observer on Earth? A. 120 m B. 150 m C. 200 m D. 240 m
76. A spaceship is moving at 0.8c relative to an observer on Earth. The spaceship's passengers measure a distance of 200 meters between two points. What is the distance between the points according to the observer on Earth? A. 120 m B. 150 m C. 200 m D. 240 m
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Transcribed Image Text:76. A spaceship is moving at 0.8c relative to an observer on Earth. The spaceship's passengers
measure a distance of 200 meters between two points. What is the distance between the
points according to the observer on Earth?
A. 120 m
B. 150 m
C. 200 m
D. 240 m
77. If an object's total energy is 3 times its rest energy, what is the object's speed relative to an
observer?
A. 0.66c
B. 0.82c
C. 0.94c
D. 0.99c
78. An observer on Earth measures a spaceship's length to be 3,000 meters when it is at rest. If
the spaceship's speed relative to the observer is 0.99c, what is the length of the spaceship
according to the observer when it is moving?
A. 423 m
B. 840 m
C. 1,800 m
D. 2,300 m
79. A particle has a rest mass of 1 kg and is moving at a speed of 0.7c relative to an observer.
What is the relativistic momentum of the particle?
A. 0.7 kg m/s
B. 1.4 kg m/s
C. 2.1 kg m/s
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