If the Sun's core suddenly shrank a little bit, what would happen in the Sun?
A) The core would cool off and continue to shrink as its density increased.
B) The density of the core would decrease, causing the core to cool off and expand.
C) The core would heat up, causing it to radiate so much energy that it would shrink even more.
D) The core would heat up, fusion rates would increase, and the core would re-expand.
D
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Which casting technique is appropriate for a very complex metal shape that cannot be removed from a mold?
(a) Sand mold (b) Permanent mold (c) Die (d) Investment
What is the future of Triton?
What will be an ideal response?
Do quantum uncertainties differ in any essential way from the uncertainty in a coin flip, and why or why not?
A) With sufficient information, a coin flip's outcome can be predicted, but no amount of information can remove quantum uncertainties. B) You can make money with coin flips but you can't make a red cent out of quantum theory. C) They don't differ in any essential way--both uncertainties are "inherent in nature" and cannot be removed by additional information. D) With sufficient information, quantum uncertainties can be removed, but no amount of information can make a coin flip predictable. E) They don't differ in any essential way--both are a consequence of the observer's insufficient information and can be removed by obtaining additional information.
Which force did Kepler believe moved the planets around the Sun?
a. electricity b. inertia c. light from the Sun d. gravity e. magnetism