Because of trapped air inside, snow is a
A) poor conductor.
B) good insulator.
C) both of these
D) none of the above
Answer: C
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A charge Q accumulates on the hollow metallic dome, of radius R, of a Van de Graaff generator. A probe measures the electric field strength at various points outside the sphere's surface. By what factor will the electric field value at the 2R distance be changed if the charge value were increased to (5/3)Q?
a. 3/5 c. 5/3 b. (5/3)2 d. (3/5)2
Earth and Venus have more substantial atmospheres because they are larger and had more volcanic activity.
Answer the following statement true (T) or false (F)
If an object is located 20 m to the left of the origin at 1:00 PM, and later the object is located 30 m to the right of the origin at 2:00 PM, then the displacement from 1:00 PM to 2:00 PM is
A. 50 m to the right. B. 30 m to the right. C. 25 m to the right. D. 20 m to the left. E. 10 m to the left.
What would happen if Jupiter was suddenly replaced by a black hole with the same mass as Jupiter?
A) The orbits of the planets in our solar system would be unaffected. B) The other planets would slowly be pulled into Jupiter, but the Sun would be unaffected. C) The other planets and the Sun would slowly be pulled into Jupiter. D) The entire solar system would rapidly be sucked into the black hole.