Which of the following occurs when charging by rubbing? a. electrons are created through friction. b. protons combine with neutrons, leaving a net negative charge. c. electrons are ripped off one material and held tightly by the other material. d. protons are ripped off one atom and congregate on another.
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Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon
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Panel bc in fig. p2.76 is semi-circular, with the 3 meter radius and horizontal straight edge through point b. compute (a) the hydrostatic force of the water on the panel, (b) its center of pressure, and (c) the moment of this force about point b. assume atmospheric pressure on the dry side of the panel
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Which of these best describes the term ecliptic? a. the circle where "earth meets the sky" b. the change in azimuth and altitude of an object c. the point directly above the geographic north pole d. the path of the sun through the constellations of the zodiac
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If one object has a large redshift and another object has a small redshift, what can we conclude about these two objects?
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Which of the following occurs when charging by rubbing? a. electrons are created through friction....
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