Fanning out of waves upon passing through an opening is more pronounced through
A) small openings.
B) large openings.
C) same for each
D) none of the above
Answer: A
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What keeps water frozen on Mars?
a. The constant subzero surface temperatures b. The low atmospheric pressure of the planet c. The distance between Mars and the Sun d. The relatively quick rotation period e. The negligible axis tilt of the planet
A steel sphere with a radius of 2.0 m falls off a ship and sinks to a depth where the pressure is 15 MN/m2. The bulk modulus for steel is 1.6×1011 N/m2. What is the change in the radius of the sphere?
A) 0.021 mm B) 4.2 mm C) 0.42 mm D) 0.19 mm E) 0.063 mm
The figure above shows how the luminosity of supernovae changes over time. About how long does it take a white dwarf supernova to decrease in luminosity by a factor of 100 from its peak?
A) 300 days B) 200 days C) 100 days D) 25 days
An occluded front can occur when
A) two different air masses are unable to overtake one another. B) a warm front and a cold front merge. C) warm air moves into a cold air mass. D) a cold air mass overtakes a warm air mass.