The jovian planets:
A) all lie less than 5 AU from the Sun.
B) all have rings around their equators.
C) all spin slower than the Earth.
D) have satellite systems with less than 4 moons.
E) are all much more dense than any of the terrestrials planets.
B
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In a chiller unit, ammonia is to be condensed at a saturation temperature of 50ºC by passing the ammonia vapor over vertical plates 100 cm high by 150 cm wide and at a surface temperature of 20ºC. Estimate the average convective heat transfer coefficient and the amount of ammonia condensing from one plate surface. Use a value of 1052.8 kJ/kg for hnfg for ammonia.
What will be an ideal response?
The length of a certain wire is doubled while its radius is kept constant. What is the new resistance of this wire?
A) It stays the same. B) It is 2 times as large. C) It is 3 times as large. D) It is 4 times as large. E) It is 1/2 as large.
The average energy dissipated in an inductor is
A) zero. B) proportional to the inductance. C) proportional to both the inductance and frequency. D) proportional to the frequency. E) none of the above.
The Elysium region is a _____
A) highland area on Venus B) frozen polar cap on Neptune C) volcanic plain on Mars D) geological fault on Uranus