We have a hollow metallic sphere with charge ?5.20 µC and radius 5.40 cm. We insert a +10.4-µC charge at the center of the sphere through a hole in the surface. What charge now rests on the outer surface of the sphere?
a. +5.20 µC
b. +15.6 µC
c. –5.20 µC
d. –15.6 µC
e. –10.4 µC
a
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Exhibit 14-1
A square of side 
is removed from one corner of a square sandwich that has sides of length L. The center of mass of the remainder of the sandwich moves from C to C'.
?
?
Use this exhibit to answer the following question(s).
Refer to . The displacement of the y coordinate of the center of mass (from C to C') is
A.
.B.
.C.
.D.
.E.
.On the equator, days and nights are always 12 hours long, no matter what time of year
Indicate whether the statement is true or false
Consider two flywheels of the same size and shape, but one with twice the mass. Rotational inertia of the more massive one is
A) two times greater. B) four times greater. C) the same as the other one. D) half.
An object moves at a constant velocity of 12 m/s to the southwest for an interval of 20 s. Halfway through this interval, what is the magnitude of its instantaneous velocity?
a. It can be any value from 0 to 24 m/s. c. 12 m/s b. 6 m/s d. More information is needed.