The Kuiper Belt objects have orbits that
A) carry them thousands of AU beyond the Sun.
B) stay out just beyond Neptune and close to the ecliptic.
C) stay sixty degrees ahead of or behind Jupiter.
D) cross the orbit of Mars at perihelion.
E) cross the orbit of Earth at perihelion.
B
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Current: When current is flowing in an ordinary metal wire, the magnitude of the average velocity of the electrons is closest to
A. 10 m/s. B. the speed of light. C. 1 mm/s. D. 1 km/s. E. 1 m/s.
A 20.0 cm long organ pipe is filled with air and is open at one end and closed at the other. The velocity of sound in air at 0
is 331 m/s. What is the frequency of the third mode?
A. 2,070 Hz B. 2,190 Hz C. 2,320 Hz D. 2,450 Hz E. 2,680 Hz
A piece of taffy slams into and sticks to an identical piece of taffy at rest. The momentum of the combined pieces after the collision is the same as before the collision, but this is not true of the kinetic energy, which partly degrades into heat
What percentage of the kinetic energy becomes heat? A) 0% B) 25% C) 50% D) 75% E) need more information
Order these objects by size (radius) from smallest to largest:
A) 3 solar mass black hole, 3 solar mass neutron star, 0.5 solar mass white dwarf, 1 solar mass white dwarf. B) 0.5 solar mass white dwarf, 1 solar mass white dwarf, a 3 solar mass neutron star, a 3 solar mass black hole. C) 3 solar mass neutron star, 3 solar mass black hole, 1 solar mass white dwarf, 0.5 solar mass white dwarf. D) 3 solar mass black hole, 3 solar mass neutron star, 1 solar mass white dwarf, 0.5 solar mass white dwarf. E) 0.5 solar mass white dwarf, 1 solar mass white dwarf, a 3 solar mass black hole, a 3 solar mass neutron star. F) 1 solar-mass white dwarf, 0.5 solar-mass white dwarf, a 3 solar-mass neutron star, a 3 solar-mass black hole.