Electrons in the presence of a magnetic field transition from 4p energy states to 3d states. How many different spectral lines could be observed from these transitions?
A) one B) two C) three D) five
C
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Coulomb's Law: As shown in the figure, charge q1 = 2.2 × 10-6 C is placed at the origin and charge q2 = -3.30 × 10-6 C is placed on the x-axis, at x = -0.200 m. Where along the x-axis can a third charge Q = -8.30 × 10-6 C be placed so that the resultant force on Q is zero?
Fill in the blank(s) with the appropriate word(s).
Approximately how soon might we expect an immediate response from a civilization that received the signal we sent to the globular cluster M13 (21,000 light-years away) in 1974?
A) 84,000 years B) 21,000 years C) 10,500 years D) 42,000 years
A curling stone slides on ice with a speed of 2.0 m/s and collides inelastically with an identical, stationary curling stone
After the collision, the first stone is deflected by a counterclockwise angle of 28° from its original direction of travel, and the second stone moves in a direction that makes a 42° clockwise angle with the original direction of travel of the first stone. What fraction of the initial energy is lost in this collision? A) 0.12 B) 0.24 C) 0.36 D) 0.48 E) 0.64
In a double-slit experiment, the slit separation is 2.0 mm, and two wavelengths, 750 nm and 900 nm, illuminate the slits
A screen is placed 2.0 m from the slits. At what distance from the central maximum on the screen will a bright fringe from one pattern first coincide with a bright fringe from the other? A) 1.5 mm B) 3.0 mm C) 4.5 mm D) 6.0 mm