The electric field inside the dome of a Van de Graaff generator depends on the
A) amount of external charge.
B) volume of the dome.
C) amount of charge and volume of the dome.
D) none of the above
Answer: D
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Which of the following is not caused by side branches on a polymer?
(a) Decreased density (b) Decreased transparency (c) Decreased crystallinity (d) Decreased hardness
Spherical Mirrors: A concave spherical mirror has a focal length of magnitude 20 cm. An object is placed 10 cm in front of the mirror on the mirror's axis. Where is the image located?
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If the plane of the Moon's orbit around the Earth was perfectly aligned with the ecliptic plane (instead of being tilted by about 5°), a solar eclipse would be visible on some parts of Earth
A) once a day. B) never. C) about once a month. D) about once every six months. E) about once a year.
Motion in a circle at constant speed is motion with
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