In Einstein's General Theory of Relativity, higher dimensions beyond the three that we can comprehend are called
A) hidden space
B) hyperspace
C) excited space
D) extra space
B
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Which of the following is not true of Mercury?
A) Even on Mercury's night side, the temperature is hot enough to melt lead. B) Mercury rotates exactly three times for every two orbits it makes around the Sun. C) Its surface is heavily cratered. D) Mercury has essentially no atmosphere.
The figure above shows the geological time scale of Earth. The time since dinosaurs went extinct (with the K-T event) represents approximately ________ of the Earth's history.
A) 0.15% B) 1.5% C) 15% D) 50%
According to present understanding, a nova is caused by
A) hydrogen fusion on the surface of a white dwarf. B) carbon fusion in the core of a white dwarf. C) hydrogen fusion on the surface of a neutron star. D) a white dwarf that gains enough mass to exceed the 1.4-solar-mass limit.
Object A has an electric charge that is 10 times larger than the charge on object B. When placed near each other, how does the force by A on B compare with the force by B on A?
A) The force by A on B is 10 times smaller. B) The force by A on B is 100 times larger. C) The force by A on B is 10 times larger. D) The force by A on B is 100 times smaller. E) They are equal.