Mars has two moons, Phobos and Deimos
a. True
b. False
Indicate whether the statement is true or false
True
Physics & Space Science
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Harlow Shapley found the visible disk of the Galaxy is about ________ kpc across
A) 8 B) 30 C) 8,000 D) 10,000 E) 30,000
Physics & Space Science
The moon's acceleration is directed
A) forward, along its direction of motion. B) outward, away from Earth. C) zero. D) backward, opposite to its direction of motion. E) inward, toward the center of Earth.
Physics & Space Science
One ampere × one second is a unit of
a. power. b. current. c. voltage. d. electric charge. e. resistance.
Physics & Space Science
What is the distance between nodes?
A. wavelength/4 B. wavelength/3 C. wavelength/2 D. wavelength/1
Physics & Space Science