What is the cause of Jupiter's slight flattening, which results in an equatorial diameter 6% greater than its polar diameter?
A) its rapid spin cycle
B) its massive gravitational pull
C) nuclear fission within its core
D) its frequent reversal of its magnetic poles
Answer: A
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On the 1-to-10-billion scale, about how far is it to the nearest stars besides the Sun?
A) 4 kilometers B) 400 kilometers C) 1,000 kilometers D) 4,400 kilometers E) 10,000 kilometers
The conventional direction of magnetic field lines outside a magnet are from
A) north to south. B) south to north. C) either way
Material objects cannot be accelerated up to lightspeed because
A) their length decreases [toward zero] as they approach lightspeed. B) of the curvature of space, which increases toward infinite curvature as the object approaches lightspeed. C) their inertia increases [toward infinity, i.e., without bound] as they approach lightspeed. D) nothing can move at the speed of light. E) Nonsense--objects can be sped up to lightspeed, as we can see from the example of light itself.
The amount of heat energy a refrigerator removes from the food stored inside it is ___________ the amount of electrical energy required to run the refrigerator
a. equal to b. greater than c. less than d. unrelated to