Polypropylene has _________strength at elevated temperatures than PE does.
Fill in the blank(s) with the appropriate word(s).
higher
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The average molecular kinetic energy of a gas can be determined by knowing only
A) the number of molecules in the gas. B) the volume of the gas. C) the pressure of the gas. D) the temperature of the gas. E) all of the above must be known.
When air resistance is a factor, maximum range is achieved when the projection angle is
A) less than 45.° B) 45.° C) greater than 45.° but not 90.° D) 90.°
The white light emitted by a fluorescent lamp is provided by the
A) mercury vapor in the lamp. B) phosphors on the inner surface of the lamp. C) high temperature of the glowing gas. D) filtering effect of the glass tubing.
According to Einstein's theory of relativity, the universe is made of
A) matter and anti-matter. B) radiation. C) energy. D) popcorn. E) matter.