A thin spherical shell of radius 20.0 cm has 5.0 ?C of charge uniformly distributed over its surface. What is the electric flux through an area of 1.00 m2 of a spherical surface concentric with the shell of charge but having a radius of 1.00 m?
a. 
b. 
c. 
d. 
e. 0
b.
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A positively charged metal sphere A is brought into contact with an uncharged metal sphere B. As a result:
A) both spheres are positively charged B) A is positively charged and B is neutral C) A is positively charged and B is negatively charged D) A is neutral and B is positively charged E) A is neutral and B is negatively charged
As the wavelength of light increases, its energy ________.
A. decreases B. remains constant C. moves more slowly D. increases E. moves more quickly
A force F is applied to a cylindrical roll of paper of radius R and mass M by pulling on the paper as shown. The acceleration of the center of mass of the roll of paper (when it rolls without slipping) is
?
?
a.
.
b.
A basketball player pushes down with a force of 50 N on a basketball that is inflated to a gauge pressure of 8.0 × 104 Pa. What is the diameter of contact between the ball and the floor?
A) 2.8 cm B) 1.4 cm C) 1.7 cm D) 2.1 cm E) 5.6 cm