If electric field lines flow out of a positive charge, as shown in this figure, where do these same lines terminate?
a. The lines continue forever.
b. They terminate on negative charge, not shown in the figure.
c. The lines are fictitious and need not terminate anywhere.
d. The lines simply become weaker with distance until they disappear.
e. The field lines circle around and return to the same charge they started from.
b
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You push on a block on frictionless ice with a force of 8 N, causing it to accelerate at 2 m/s2 . The mass of the block is __________
Fill in the blank(s) with correct word
Polarization: Polarized light of intensity S0 passes through an ideal polarizer. If the electric vector of the polarized light is horizontal what, in terms of the initial intensity S0, is the intensity of the light that passes through a polarizer if that polarizer is tilted 0.449 rad from the horizontal?
A. 0.812 S0 B. 0.188 S0 C. 0.217 S0 D. 0.284 S0
Instructions: On occasion, the notation 
= [A, ?] will be a shorthand notation for 
.
Adding vectors 
and 
by the graphical method gives the same result for 
and 
. If both additions are done graphically from the same origin, the resultant is the vector that goes from the tail of the first vector to the tip of the second vector, i.e, it is represented by a diagonal of the parallelogram formed by showing both additions in the same figure. Note that a parallelogram has 2 diagonals. Keara says that the sum of two vectors by the parallelogram method is 
. Shamu says it is 
. Both used the parallelogram method, but one used the wrong diagonal. Which one of the vector pairs below contains the original two vectors?
A.
B.
C.
D.
E.
Which of the following agrees with a no-center, no-edge Universe?
a. a flat geometry b. a positive-curved geometry c. a negative-curved geometry d. All of the other choices are correct.