The rate of cratering
A) has remained constant over the last 4.6 billion years.
B) has recently increased with more collisions in the asteroid belt.
C) fluctuates over time, with massive bodies occasionally coming in from the Oort Cloud.
D) shows that large asteroid impacts are more common now than in the past.
E) shows that most interplanetary debris was swept up soon after the formation of the solar system.
E
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The constellation of Orion is currently visible in the evenings in January. Precession will not affect this and Orion will still be visible in January 13,000 years from now
Indicate whether the statement is true or false
How and when did supermassive black holes form?
What will be an ideal response?
Light emitted by the Sun is
A) polarized. B) nonpolarized. C) sometimes polarized.
If you know the impulse that has acted on a body of mass m you can calculate
a. its initial velocity. b. its final velocity. c. its final momentum. d. the change in its velocity. e. its acceleration during the impulse.