When the speed of sound near the ground is greater than higher in the air, sound tends to be bent
A) upward.
B) downward.
A
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Which of the following explains why glycosides do not undergo mutarotation?
A) There is no longer an anomeric carbon. B) There are no longer any stereocenters. C) The ring structure does not open to become the open-chain structure. D) None of the above is correct.
The most dangerous type of volcano is a
A. huge shield volcano. B. cinder cone whose magmas are interacting with groundwater. C. cinder cone. D. composite volcano.
During a total lunar eclipse, the moon remains visible because ________
A) the atmosphere of the earth refracts light around its perimeter B) the atmosphere of the moon diffuses light from the other side of the moon C) the earth is too far from the moon to totally cover the solar disk D) None of the above; the moon completely disappears against the night sky.
Earthquake prediction is ________
A) generally good if you live in an area along a plate boundary because we know how fast the plates are moving and can measure the stress accumulation B) possible for short times before some earthquakes based on things like animal behavior, but the U.S. does not make use of this method. C) not possible D) somewhat good for very long term statistical analyses based on ideas like mapping seismic gaps