A year is defined as:
A) the time it takes for Earth to complete a rotation on its axis.
B) the time it takes for the Moon to complete an orbit of Earth.
C) the time it takes for the Moon to complete a phase cycle.
D) the time it takes for Earth to complete an orbit around the Sun.
E) the time it takes for the Sun to complete an orbit around Earth.
D
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A paperclip with the density of a neutron star would weigh (on the Earth)
A) more than the Earth. B) more than Mt. Everest. C) a few tons. D) about the same as a regular paperclip. E) more than the Moon.
State which element is oxidized and which is reduced in the reaction Fe + Cl2? FeCl2
Which one of the following is TRUE?
a) Irregular galaxies rarely have star formation taking place in them. b) Galaxy collisions destroy most of the stars in the galaxies involved. c) Most elliptical galaxies contain only young stars. d) Most galaxies appear to be approaching the Milky Way Galaxy. e) There is a supermassive black hole in the center of the Milky Way Galaxy
In music the 3rd harmonic is which overtone?
A) 4th B) 2nd C) 1st D) 3rd E) 5th