The smallest sort of interplanetary matter is called:
A) an asteroid.
B) interplanetary dust.
C) a meteoroid.
D) a Kuiper Belt Object.
E) a comet.
B
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Organic molecules are:
A) living cells. B) carbon-based. C) silicon-based. D) found only on Earth. E) not found outside our solar system.
The sensitive dependence upon initial conditions of the evolution of some physical systems is a feature of
a. gravitation. b. fractals. c. air resistance. d. dynamical chaos. e. quantum mechanics.
The rate of heat dissipation in an AC circuit with resistance, R, and effective current, Irms, is given by which of the following?
a. 0.5 × (Irms)2R b. (Irms)2R c. 2.0 × (Irms)2R d. 4.0 × (Irms)2R
Match the words at the left to the correct blanks in the sentences at right. Use each choice only once.
A. Spacecraft images show fountains of ice spraying into space from Saturn's moon _________ B. Jupiter has three moons for which there is evidence of a global, subsurface ocean of liquid water, with the strongest evidence favoring an ocean on _________ C. ______ is the most volcanically active world in the solar system. D. Scientists have detected lakes of liquid methane and ethane on the surface of __________ E. The two moons that are larger than the planet Mercury are Titan and __________, which is also the largest of Jupiter's moons (and largest moon in the solar system).