What evidence is there that Titania underwent an active geological phase?
a. It has no large craters on its surface and a network of faults.
b. It currently has active volcanoes on its surface
c. It is covered in methane ice.
d. It has a very smooth and highly reflective surface.
e. It has a large rocky core surrounded by an icy mantle.
a
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Which of the following is not a good reason to place an observatory on a remote mountain to?
A) reduce the impact of light pollution B) reduce the twinkling caused by Earth's atmosphere C) allow study of infrared light D) allow observations at ultraviolet and x-ray wavelengths
A jumbo jet has a mass of 100,000 kg. The thrust for each of its four engines is 50,000 N. What is the jet's acceleration when taking off?
A) 0.25 m/s2 B) 1 m/s2 C) 2 m/s2 D) 4 m/s2 E) none of the above
What is the mean free path of molecules in an ideal gas in which the mean collision time is 3.00 × 10-10 s, the temperature is 300 K, and the mass of the molecules is 6.00 × 10-25 kg?
A) 7.22 × 10-8 m B) 4.32 × 10-8 m C) 9.19 × 10-8 m D) 1.39 × 10-8 m E) 6.71 × 10-8 m
A harmonic oscillator starts with an amplitude of 20.0 cm. After 10.0 s, the amplitude decreases to 15.0 cm. If the linear damping coefficient is 2.00 Ns/m, how much mass is oscillating?
A) 30.0 kg B) 15.0 kg C) 34.8 kg D) 17.9 kg E) 3.88 kg