If the Andromeda Galaxy collided with the Milky Way, what would most likely happen to Earth?
A) nothing
B) The Sun and all its planets would be crushed by collisions with stars and planets from the Andromeda Galaxy.
C) The Sun would not be disturbed, but the solar system would be ripped apart.
D) The Sun would die, causing Earth to die as well.
A) nothing
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What do we mean by the straightest possible path between two points on Earth's surface?
A) a path that actually is a perfectly straight line B) a path that follows a circle of latitude C) a path that follows a circle of longitude D) a path that crosses the equator E) the shortest path between the two points
A block of wood has density 0.500 g/cm3 and mass 2 000 g. It floats in a container of oil (the oil's density is 0.750 g/cm3). What volume of oil does the wood displace?
a. 4 000 cm3 b. 2 670 cm3 c. 1 500 cm3 d. 1 000 cm3 e. 500 cm3
A proton strikes an Oxygen-18 nucleus producing Fluorine-18 and another particle. What other particle is produced by this nuclear reaction?
A) a neutron B) an alpha particle C) a gamma particle D) a ?- particle E) a ?+ particle
The surface of Comet 67P/CG as detected by the Rosetta mission is best described as
A) smooth with parallel striations. B) smooth with many hilly areas. C) rough with cracks and crevices. D) rough with many craters.