The Burger’s vector in ionic materials is larger than in elemental metals, because the Burger’s vector must connect two _____________points.
Fill in the blank(s) with the appropriate word(s).
lattice
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An ideal gas at pressure, volume, and temperature, P0, V0, and T0, respectively, is heated to point A, allowed to expand to point B also at A’s temperature 2T0, and then returned to the original condition. The internal energy decreases by 3P0V0/2 going from point B to point
T0. How much heat left the gas from point B to point T0?
a.
0
b.
P0V0/2
c.
3P0V0/2
d.
5P0V0/2
The Planck era refers to the time period
A) before the Big Bang. B) before the Planck time. C) after the Planck time. D) after inflation. E) after the GUT era.
If a force on an object is aimed perpendicular to the direction of the object's velocity, the force does
a. no work c. negative work b. positive work d. any of the above
Stellar parallax is the apparent
A) shift in position of nearby stars as the Earth moves around the Sun B) westward motion of a planet with respect to the background stars C) shift in position of nearby stars as the Sun moves about the center of the galaxy D) shift in position of nearby stars as the Earth rotates on its axis