The Compton effect demonstrates
A)
relativistic formulation works well.
B)
consistent explanations of scattered photon shift in wavelength.
C)
light acts as photons.
D)
all of the above.
E)
none of the above.
D
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The water table is found at the top of the
A) contact between an aquifer and an underlying, impermeable rock. B) zone of aeration. C) zone of saturation. D) permeability zone.
Resistance and Resistivity: The figure shows a graph of the resistance of a wire as a function of its length. What physical quantities does the slope of this graph represent?
A. the cross-sectional area of the wire B. the resistivity of the material of which the wire is made C. the product of the resistivity and the cross-sectional area of the wire D. the resistivity of the material divided by the cross-sectional area of the wire E. the reciprocal of the resistivity of the material
Which of the following statements about brown dwarfs is not true?
A) Brown dwarfs are supported against gravity by degeneracy pressure, which does not depend on the object's temperature. B) Brown dwarfs eventually collapse to become white dwarfs. C) All brown dwarfs have masses less than about 8% that of our Sun. D) Brown dwarfs form like ordinary stars but are too small to sustain nuclear fusion in their cores.
If VA?VB = 50 V, how much energy is stored in the 36-?F capacitor?
A. 50 mJ B. 28 mJ C. 13 mJ D. 8.9 mJ E. 17 mJ