What happens to Pluto's atmospheric gases over time?
A) Pluto traps gases from other Kuiper Belt Objects, causing its atmosphere to become much, much thicker.
B) Pluto does not have an atmosphere.
C) Pluto's atmosphere vaporizes over time, due to low gravity in the exosphere.
D) Pluto's atmosphere is collapsing gases that freeze and fall to the surface.
D
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The fact that Voyager 10 continues to speed out of the solar system, even though its rockets have no fuel, is an example of
A) Newton's first law of motion. B) Newton's second law of motion. C) Newton's third law of motion. D) the universal law of gravitation. E) none of the above
The white light emitted by a fluorescent lamp is provided by the
A) mercury vapor in the lamp. B) phosphors on the inner surface of the lamp. C) high temperature of the glowing gas. D) filtering effect of the glass tubing.
An electron of mass 9.11 × 10^–31 kg has a momentum of 2.06 × 10^–22 kg•m/s. What is its speed?
a. 0.800c b. 0.467c c. 0.602c d. It cannot have this momentum since it would require a speed greater than c.
The maximum efficiency of a heat engine operating between 2°C and 200°C will be about ________
a. 10% b. 40% c. 60% d. 90% e. 100%