What is the defining property of the Trojan asteroids?
A) Their orbital periods are exactly one year, like ours.
B) They have orbits that cross the orbit of the Earth, but not that of Venus.
C) They have orbits at the distance of Jupiter and 60 degrees ahead of or behind it.
D) They have orbits between Saturn and Uranus.
E) Like Pluto, they are in a 3:2 resonance with Neptune.
C
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Compare the frictional pressure drop due to the vapor flow to that due to the liquid flow through the wick for a heat pipe using ammonia as the working fluid. Assume that the ratio of dynamic viscosities of ammonia is µI/µV = 3.0, the inside diameter of the wick is 2 cm and the annular area of the wick is 0.65 cm^2. The wick is phosphor-bronze.
What will be an ideal response?
How much mass does the Sun lose through nuclear fusion per second?
A) 4 tons B) 4 million tons C) 600 tons D) 600 million tons E) Nothing: mass is conserved.
Which of the following are the jovian planets?
A) Jupiter, Saturn, Uranus, Neptune, and Pluto B) only Jupiter C) only Jupiter and Saturn D) Jupiter, Saturn, Uranus, and Neptune only E) everything past Mars and the asteroid belt
A lab specimen is 15.2 mm from a converging lens. The image is 4.0 mm tall and 9.0 cm from the lens. How tall is the specimen?
A) 6.8 mm B) 1.7 mm C) 5.4 mm D) 0.68 mm