During a very cold winter, water pipes sometimes burst because
A) the ground contracts when colder, pulling pipes apart.
B) water expands when freezing.
C) water contracts when freezing.
D) the thawing process produces pressure on the pipes.
E) none of the above
Answer: B
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Absolute visual magnitude is the:
A) apparent magnitude of a star observed from Earth. B) luminosity of a star observed from a distance of 1000 pc. C) apparent magnitude of a star observed from a distance of 10 pc. D) luminosity of a star observed from Earth.
A simply supported beam with proportional loading (P 5 4.1 kN) has span length L 5 5 m. Load P is 1.2 m from support A and load 2P is 1.5 m from support B. The bending moment just left of load 2P is approximately:
(A) 5.7 kN?m
(B) 6.2 kN?m
(C) 9.1 kN?m
(D) 10.1 kN?m
Going from medium mass nuclei to a heavy nuclei, the average binding energy per nucleon
A) decreases. B) behaves randomly. C) remains constant. D) increases. E) doubles.
Which of the following is NOT a property of neutrinos?
A) Can change forms in the eight minutes from the Sun's core to us B) Almost massless C) Can travel very close to the speed of light D) Neutral in charge E) Cannot interact at all with normal matter