Charge carriers in a metal are electrons rather than protons because electrons are
A) negative.
B) smaller.
C) loosely bound.
D) none of the above
Answer: C
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An effective theory must
A) have been proven. B) must have been around for centuries or longer. C) be continuously tested. D) include mathematical formulae.
Two equal positive charges are held in place at a fixed distance
If you put a third positive charge midway between these two charges, its electrical potential energy of the system (relative to infinity) is zero because the electrical forces on the third charge due to the two fixed charges just balance each other. A) True B) False
The lithosphere consists of
a. all of the crust's depth. b. all of the crust's depth and part of the mantle's depth. c. part of the crust's depth. d. all of the crust's depth and all of the mantle's depth.
A sample of an ideal gas has a volume of 0.0100 
a pressure of 
Pa, and a temperature of 300 K. What is the number of moles in the sample of gas?
A. 0.302 B. 0.330 C. 0.375 D. 0.401 E. 0.502