According to the special theory of relativity, which of the following happens to the size of the time interval between two events occurring in an inertial frame of reference as the frame's velocity with respect to the observer increases?
a. interval increases
b. interval decreases
c. interval remains constant
d. interval vanishes to zero when velocity equals half speed of light
a
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Which of the following describes the most convincing evidence in support of the idea that human activity is causing climate change on Earth?
A) Polls show that a majority of Americans agree that this is the case. B) The vast majority of scientists say so. C) The known science behind the greenhouse effect predicts that warming should be occurring as the carbon dioxide concentration rises, and the average temperature is rising as expected. D) There is no other known process besides the burning of fossil fuels that can lead to any change in Earth's average temperature.
A man weighs 650 N while on the surface of Earth. If he is transported to the planet Mythos, which has the same mass as Earth but a radius that is five times larger than Earth's, his weight would be
A. 16,250 N. B. 26 N. C. 3,250 N. D. 130 N. E. 650 N.
If more terrestrial radiation were able to leave Earth's atmosphere than at present, we would experience
A) global cooling. B) no change in temperature. C) global warming. D) more severe weather.
The Great Red Spot on Jupiter is ________.
A. a largo tornado sweeping the planet from north to south B. a large rising cloud of gas C. a planetesimal impact site D. a giant vortex that has persisted for over 300 years