Light which reflects off a pond of water undergoes a phase shift of
A) 90°.
B) 180°.
C) 0°.
D) 270°.
E) 45°.
B
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One of the best known craters on Earth is the Barringer Crater in Arizona. It was formed by:
A) a large volcanic eruption. B) the same impact thought to have contributed to the extinction of the dinosaurs. C) the impact of an asteroid whose mass was around 200,000 tons. D) testing of nuclear bombs during the Cold War. E) the impact of a comet whose mass was around 25 tons.
Two nuclei have the same number of protons but different numbers of neutrons. We call these two nuclei
A. ions. B. atomic mass units. C. isotopes. D. isobars.
A long solenoid (diameter = 5.0 cm) is wound with 960 turns per meter of thin wire through which a current of 300 mA is maintained. A wire carrying 12 A is inserted along the axis of the solenoid. What is the magnitude of the magnetic field at a point 2.0 cm from the axis?
a. 0.41 mT b. 0.48 mT c. 0.38 mT d. 0.56 mT e. 0.24 mT
Natural rubber is made from the polymer _________.
Fill in the blank(s) with the appropriate word(s).