A primary rainbow is brighter than a secondary rainbow because
A) sunlight reaching it is more intense.
B) there is one less reflection inside the water drops.
C) larger drops produce primary rainbows.
D) the secondary bow is a dim reflection of the primary rainbow.
E) none of the above
Answer: B
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A 120 kg scuba diver with tanks and equipment is submerged and floating underwater in seawater. The volume of the seawater displaced by the scuba diver with tanks and equipment is
A. 0.097 
B. 0.102
C. 0.117
D. 0.154
E. 0.177
How do the surface temperatures and pressures on Titan compare to those on the Earth?
A) higher temperatures and higher pressures B) lower temperatures and lower pressures C) higher temperatures and lower pressures D) lower temperatures and higher pressures
Storm winds blowing at high speed over a roof can destroy the roof of a closed-up house because of Bernoulli's Principle. What happens is
A. the wind inside the house blows out the roof from the inside. B. friction rips up the roof and blows it apart. C. the higher pressure inside lifts the roof off the walls. D. the roof is pushed inward and collapses.
The person who first explained the discrete hydrogen atom spectrum was __________
Fill in the blank(s) with correct word