Compared with the wavelengths of visible light, the wavelengths of matter waves in atoms are relatively

A) long.
B) short.
C) neither, for all are the same.

Answer: B

Physics & Space Science

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Fill in the blank in the following chemical reaction that occurs in theSun: Deuterium+proton = ?? + energy:

a) hydrogen-1 b) helium-3 c) deuterium-2 d) carbon-12 e) helium-4

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A mass of 1000 kg hangs at the end of a steel rod 5.0 m in length. The diameter of the rod is 0.80 cm and Young's modulus for the rod is 210,000 MN/m2. What is the elongation of the rod?

A) 1.2 cm B) 0.46 cm C) 0.12 cm D) 1.8 cm E) 0.047 cm

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The tungsten filament of a light bulb has an operating temperature of about 2100 K. If the emitting area of the filament is 0.80 cm2, and its emissivity is 0.68, what is the power output of the light bulb? (s = 5.67 × 10^-8 W/m2 • K4)

a. 100 W c. 60 W b. 75 W d. 40 W

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The anomalous Zeeman effect is different from the normal Zeeman effect because

a.to observe the normal Zeeman effect, the atom must be in a magnetic field, while the anomalous Zeeman effect depends on the external electric field. b.the split of energy levels from the anomalous Zeeman effect depends on the Lande g factor and the split from the normal Zeeman effect depends on the gyromagnetic ratio. c.the split of energy levels from the anomalous Zeeman effect depends on the intrinsic spin quantum number and the split from the normal Zeeman effect depends on the magnetic quantum number. d.the total angular momentum vector only precesses in the anomalous Zeeman effect.

e. only the normal Zeeman effect depends on the angular momentum L.

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Physics & Space Science