Olber's paradox is explained by the fact that the Universe is neither static nor infinite in age
a. True
b. False
Indicate whether the statement is true or false
True
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If two balls are thrown from the same cliff with the same speed, one up, one down, when they touch the ground, they should:
a. have different speed b. the same speed c. touch the ground in the same time d. travel the same distance in the air e. none of above
Essentially, the Great Red Spot is:
A) Neptune's largest atmospheric feature. B) a large cyclonic storm (hurricane). C) always located within 10 degrees of Jupiter's north pole. D) composed primarily of iron oxide. E) traveling north and south across Jupiter's face.
If you do an experiment on Earth, and then do an identical experiment in a jet plane moving uniformly at a high speed, you get identical results from both experiments. This is an example of
a. time dilation. b. length contraction. c. the equivalence of mass and energy. d. the principle of relativity. e. none of the above.
A long straight wire (diameter = 2.0 mm) carries a current of 40 A. What is the magnitude of the magnetic field 1.5 mm from the axis of the wire?
a. 3.0 mT b. 12 mT c. 5.3 mT d. 7.4 mT e. 8.0 mT