As rock is heated, the first minerals to melt are those
A) with the highest melting point.
B) with the lowest melting point.
C) composed of granitic magma.
D) that have undergone partial distillation.
Answer: B
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Magnetic Field of a Long Wire: A vertical wire carries a current vertically downward. To the east of this wire, the magnetic field points
A. north. B. east. C. south. D. down.
A horizontal force of 1000 N is needed to overcome the force of static friction between a level floor and a 250-kg crate. If g = 9.8 m/s2, what is the coefficient of static friction?
a. 4.0 c. 0.41 b. 0.51 d. 0.31
The significant result of the Michelson-Morley experiment was that it found
a. the ether moved with the Sun. b. the ether moved with the Earth. c. the speed of the ether wind was greater than expected. d. no effect.
A spin-1/2 particle that does not interact via the strong interaction is a(n)
a. lepton b. baryon c. meson d. intermediate (or gauge) boson e. hadron