Which of the Uranian moons displays the widest range of surface terrains, suggesting some catastrophic disruption?
A) Puck
B) Umbriel
C) Oberon
D) Miranda
E) Ariel
D
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Several electrons are placed on a hollow metal sphere. They
A) clump together on the sphere's inner surface. B) clump together on the sphere's outer surface. C) become uniformly distributed on the sphere's outer surface. D) become uniformly distributed on the sphere's inner surface.
Are sunspots really dark and cool?
What will be an ideal response?
Consider the following situations:
· a car slowing down at a stop sign · a ball being swung in a circle at constant speed · a vibrating string · the Moon orbiting the Earth · a skydiver falling at terminal speed · an astronaut in an orbiting space station · a ball rolling down a hill · a person driving down a straight section of highway at constant speed with her foot on the accelerator · a molecule in the floor of this room In how many of the situations is the object accelerating?
1.One of the situations. 2.Two of the situations. 3.Three of the situations. 4.Four of the situations. 5.Five of the situations. 6.Six of the situations. 7.Seven of the situations. 8.Eight of the situations. 9.Nine of the situations. 10.None of the situations.Stepping barefoot off a rug onto a hardwood floor makes your feet feel cold. Why?
a. The hardwood floor is at a lower temperature than the rug. b. The hardwood floor is at a lower temperature than your feet. c. The hardwood floor conducts heat away from your feet better than the rug. d. all of the above