The loop has now entirely left the field.
A. forward (in the +x direction).
B. backward (in the -x direction).
C. zero.
D. some other direction (specify).
C. zero.
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A viscous fluid is flowing through a small tube at a rate of 
If the pressure difference between one end of the tube and the other is doubled and the radius is also doubled, then what is the rate of flow of the fluid?
A. 
B. 
C. 
D. 
E. 
If you could watch a time-lapse movie of the interstellar medium over hundreds of millions of years, what would you see?
A) gas that is often moving at high speed, particularly after one or more supernovae, and constantly changing form between molecular clouds, atomic hydrogen, and hot, ionized bubbles and superbubbles B) gas that changes only in very slow and steady ways, so that the movie would in fact be quite boring C) The entire disk of the Milky Way would pulsate in and out as it contracts to form stars and then blows out in supernovae and then contracts to form stars again and so on. D) The movie would alternate back and forth between being very bright when there is a lot of gas and very dark when there is very little gas.
Bright and dark fringes are seen on a screen when light from a single source reaches two narrow slits a short distance apart. The number of fringes per unit length on the screen can be doubled
A.
B.
.C.
.D.
E.
.In nuclear magnetic resonance, nuclei absorb energy when flipping between nuclear
a. mass states. b. spin states. c. charge states. d. decay states. e. isotope states.