Charge is distributed uniformly on the surface of a spherical balloon (an insulator). A point particle with charge q is inside. The electrical force on the particle q is greatest when:
A) it is just outside the surface of the balloon
B) it is at the center of the balloon
C) it is halfway between the balloon center and the inside surface
D) it is anywhere inside (the force is same everywhere and is not zero)
E) it is anywhere inside (the force is zero everywhere)
A) it is just outside the surface of the balloon
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Capacitors in Combination: When two or more different capacitors are connected in series across a potential source, which of the following statements must be true? (There could be more than one correct choice.)
A. The total voltage across the combination is the algebraic sum of the voltages across the individual capacitors. B. Each capacitor carries the same amount of charge. C. The equivalent capacitance of the combination is less than the capacitance of any of the capacitors. D. The potential difference across each capacitor is the same. E. The capacitor with the largest capacitance has the most charge.
Instructions: On occasion, the notation 
will be a shorthand notation for 
.
If vector
is added to vector , the result is 
. If is subtracted from 
, the result is 
. What is the direction of (to the nearest degree)?
A. 225°
B. 221°
C. 230°
D. 236°
E. 206°
Two identical balls are at rest side by side at the bottom of a hill. Some time after ball A is kicked up the hill, ball B is given a kick up the hill. Ball A is headed downhill when it passes ball B headed up the hill. At the instant when ball A passes ball B,
a. it has the same position and velocity as ball B. b. it has the same position and acceleration as ball B. c. it has the same velocity and acceleration as ball B. d. it has the same displacement and velocity as ball B. e. it has the same position, displacement and velocity as ball B.
Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up.Linear momentum is not conserved
a. True b. False Indicate whether the statement is true or false