A spaceship leaves Earth and maintains a constant force by means of a nuclear engine. As the speed of the spaceship increases, an observer on Earth finds that relative to her the magnitude of the spaceship's acceleration is
a. 0.
b. decreasing.
c. constant.
d. increasing.
e. proportional to the kinetic energy of the spaceship.
B
Physics & Space Science
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After the hydrogen in the star's core is depleted, the core
A. shrinks and heats up. B. shrinks and cools down. C. expands and heats up. D. expands and cools down.
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If the total energy of an electron in an accelerator is five times its rest energy, what is its speed? (c = 3.00 × 10^8 m/s)
a. 1.98 × 10^8 m/s c. 2.32 × 10^8 m/s b. 2.94 × 10^8 m/s d. 2.90 × 10^8 m/s
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The Milky Way is simply our edge-on view of our home Galaxy
Indicate whether the statement is true or false
Physics & Space Science
A rocket can never go faster than the speed of its exhaust
a. True b. False Indicate whether the statement is true or false
Physics & Space Science