A particle is moving with a certain speed. Its speed and energy are being measured with respect to Earth. When the particle's speed doubles, the energy increases by a factor of 4. What was the original speed of the particle?
A) 0.447c
B) 0.488c
C) 0.523c
D) 0.648c
E) 0.800c
B
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Displacement: An object moves 15.0 m north and then 11.0 m south. Find both the distance it has traveled and the magnitude of its displacement.
A. 4.0 m, 26.0 m B. 26.0 m, 4.0 m C. 26.0 m, 26.0 m D. 4.0 m, 4.0 m
What is the difference between a bound orbit and an unbound orbit around the Sun?
A) An object on a bound orbit follows the same path around the Sun over and over, while an object on an unbound orbit approaches the Sun just once and then never returns. B) An object on a bound orbit has a gravitational attraction to the Sun, while an object on an unbound orbit does not. C) A bound orbit is an orbit allowed by the universal law of gravitation, and an unbound orbit is not. D) A bound orbit is circular, while an unbound orbit is elliptical.
Radioactive dating methods and other dating methods indicate that hominids have been on Earth for about
A) 15 billion years. B) 5 billion years. C) 5 million years. D) 100,000 years. E) 5000 years.
The maximum possible speed in nature is
a. warp 10 b. the speed of light. c. infinite. d. unknown.