Two large parallel metal plates are uniformly and oppositely charged and the electric field between them is 7.6 × 106 N/C
(a) What is the charge density on each plate?
(b) If the very large charged plates are moved 2 times farther apart, what is the electric field between the plates now?
(a) ± 67. ?C/m2
(b) 7.6 × 106 N/C, unchanged
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What do we mean by accretion in the context of planet formation?
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Which of the following statements about Earth's troposphere is not generally true?
A) It is the layer of the atmosphere in which ozone absorbs dangerous ultraviolet light from the Sun. B) It is the lowest layer of the atmosphere. C) It is the layer of the atmosphere in which convection plays the most important role. D) It is a layer of the atmosphere in which temperature declines with increasing altitude.
The emf produced by an ac generator is given by 
NBA sin 
t. In the SI system, what is the value of 
for a frequency of 60.0 Hz?
A. 60.0 Hz
B. 120 rad/s
C. 2.00
rad/s
D. 377 rad/s
E. 377 Hz