Taking up as positive, which values represent the ball's vertical velocity and acceleration at points A, C, and E in the figure?
3
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Which of the following frames would be an appropriate inertial reference frame for analyzing the effects on the earth of its gravitational interaction with the moon? In each case, answer A if the frame is appropriate, or B if it would be bad for this purpose. Except for the first case, assume the frames are nonrotating.
(a) A frame attached to the earth’s surface (b) A frame attached to the earth’s center of mass (CM) (c) A frame attached to the earth–moon system’s CM (d) A frame attached to the sun’s CM (e) A frame attached to the entire solar system’s CM
For microbes to survive the journey in a meteorite from another solar system body to the Earth they would have to survive the
A) impact that blasted the rock off of the surface of its home world B) high energy particles and radiation in space C) entry through our atmosphere D) all of these
An electric motor can be manually turned and made to act as a generator
Indicate whether the statement is true or false
Giant molecular cloud complexes are located in spiral arms
a. True b. False Indicate whether the statement is true or false