Copernicus believed the Earth was the center of all celestial motion
Indicate whether the statement is true or false
FALSE
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The moon's velocity is directed
A) zero. B) backward, opposite to its direction of motion. C) forward, along its direction of motion. D) inward, toward the center of Earth. E) outward, away from Earth.
According to Kepler's third law, if you know the planet's orbital period, you can find its average distance from the Sun
Indicate whether the statement is true or false
Doug hits a hockey puck, giving it an initial velocity of 6.0 m/s. If the coefficient of kinetic friction between ice and puck is 0.20, how far will the puck slide before stopping?
a. 14 m b. 19 m c. 9 m d. 11 m e. 24 m
One explanation of the dark sky Olbers's Paradox is that light can reach us only from objects in space out to a distance in light years _______ the age of the universe in years
a. less than b. greater than c. equal to d. less than or equal to e. greater than or equal to