If the source moves, the wavelength of the sound in front of the direction of motion is smaller than the wavelength behind the direction of motion
a. True
b. False
Indicate whether the statement is true or false
True
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The banking angle in a turn on the Olympic bobsled track is not constant, but increases upward from the horizontal. Coming around a turn, the bobsled team will intentionally "climb the wall," then go lower coming out of the turn
Why do they do this? A) to reduce the g-force on them B) to increase the g-force on them C) to prevent the bobsled from turning over D) to take the turn at a faster speed E) to give the team better control, because they are able to see ahead of the turn
What physical property of Venus is vastly dissimilar compared to Earth?
a. radius b. mass c. density d. surface temperature
An experiment similar to the Miller-Urey Experiment was more recently done by NASA using an icy mixture of water, methanol, ammonia and carbon monoxide. The mixture was exposed to ultraviolet radiation
The results of this experiment were that no amino acids or DNA were formed, but complex organic molecules were observed. The purpose of this experiment was to determine whether: A) DNA could form from amino acids. B) DNA could form from ultraviolet radiation. C) ultraviolet radiation could create amino acids. D) amino acids could form in the harsh vacuum of outer space. E) amino acids cold form from water, methanol, ammonia and carbon monoxide.
Matter composed in such a way that all samples of
it have a fixed composition and identical properties is classified as a) a pure substance. b) a mixture. c) an allotrope. d) a saturated solution.