Molecular Bonds: In general, which of the following is usually the strongest bond?
A. hydrogen bond
B. van der Waals bond
C. ionic bond
Answer: C
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A conducting rod (length = 2.0 m) spins at a constant rate of 2.0 revolutions per second about an axis that is perpendicular to the rod and through its center. A uniform magnetic field (magnitude = 8.0 mT) is directed perpendicularly to the plane of rotation. What is the magnitude of the potential difference between the center of the rod and either of its ends?
A. 16 mV B. 50 mV C. 8.0 mV D. 0.10 mV E. 100 mV
Which is a unique feature of Pluto's satellite, Charon, standing out from most other satellites?
a. has an atmosphere b. tidally locked to Pluto c. mostly composed of rock d. its surface is composed of methane ice e. orbits in the plane of Pluto's equator
Which of the following would make the demonstration illustrated in this figure function less effectively?
a. Use a piece of cardboard with a greater mass. b. Use a piece of cardboard with a greater radius. c. Use a piece of cardboard with less mass and smaller radius. d. Use a thinner pencil. e. Use a thicker pencil.
Analysis of volcanic emissions suggests that eruptions could be the source of all but which of the following gases in our atmosphere?
A. nitrogen B. carbon dioxide C. water D. oxygen