If 
what is the power supplied to the circuit by 
?
A. 4.0 W
B. 8.0 W
C. 12 W
D. 16 W
E. 20 W
B. 8.0 W
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Why were astronomers in the 1990s surprised to learn that the expansion rate of the universe is getting faster with time?
A) They did not expect the universe to be expanding at all. B) They assumed that the expansion rate should never change. C) They expected gravity to be slowing the expansion rate with time.
Polaroid sunglasses reduce much glare by polarization axes that are
A) vertical. B) horizontal. C) at right angles to each other.
The resolving power of a telescope is ____
a. a measure of the minimum angular separation that can be seen with the telescope. b. a measure of the maximum angular separation that can be seen with the telescope. c. a measure of the amount of light that the telescope can gather in one second. d. the separation between the objective and the image. e. a measure of how blurry object appear in the telescope.
The segment of wire (total length including portions of incoming and outgoing wire = 6R) is formed into the shape shown and carries a current I. What is the magnitude of the resulting magnetic field at the point P?
A.
B.
C.
D.
E.
