In a craze, the _________ that hold different LCMs together are broken.
Fill in the blank(s) with the appropriate word(s).
van der Waals or secondary or dipole bonds
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An aluminum rod is 20.0 cm in length, has a diameter of 10.0 mm and is at a temperature of 20The coefficient of linear expansion of aluminum is
If the temperature changes to 50
then the increase in diameter of the aluminum rod is
A.
B.
C.
D.
E.
Which of the following substances has the greatest specific heat?
A. copper B. ice C. water D. steam E. Ice, water, and steam have equal specific heats since they are the same material, and this specific heat is greater than that of copper.
The superposition of two waves
?
and
?
at the location x = 0 in space results in
A. beats at a beat frequency of 3 Hz. B. a pure tone at a frequency of 153 Hz. C. a pure tone at a frequency of 156 Hz. D. beats at a beat frequency of 6 Hz. E. beats at a frequency of 156 Hz.
By studying distant galaxies in the 1920s, Hubble made the following important discovery that led us to conclude that the universe is expanding
A) All galaxies contain billions of stars, and all galaxies have spiral shapes. B) All galaxies outside the Local Group are moving away from us, and the farther away they are, the faster they're going. C) All galaxies were born at the same time, and all will die at the same time. D) All galaxies outside the Local Group are orbiting the Local Group. E) All galaxies outside the Local Group are moving away from us, and all are moving away at nearly the same speed.