What is the longest wavelength in the Balmer series?
A) 240 nm
B) 328 nm
C) 365 nm
D) 656 nm
E) 820 nm
D
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Two large, flat, horizontally oriented plates are parallel to each other, a distance d apart. Plate A has a uniform, positive charge density of magnitude ?A. Plate B has a uniform, negative charge density of magnitude ?B
What is the magnitude of the electric field half-way between the two plates?
A pocket of air moving south in the Northern Hemisphere will be deflected ________ by the rotation of Earth?
A. to the east B. to the south C. upward to a higher altitude D. downward toward the surface E. to the west
Which of the following is not used as a moderator material for nuclear reactors?
A) sodium B) heavy water C) graphite D) boron E) These are all used as a moderator material for nuclear reactors.
Acceleration has dimension 
Use dimensional analysis to determine the ratio of accelerations for car A to car B, if car A travels a given distance in half the time required by car B.
A. 2
B. 4
C. 
D. 1/4
E. 1/2
F. 