How far above the horizon is the Moon when its image reflected in calm water is completely polarized? (nwater = 1.333)
a. 53.12°
b. 18.44°
c. 22.20°
d. 36.88°
d
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An RLC series circuit has a 200 
resistance, a 3.00 mH inductor, and a 100 ?F capacitor. What is the resonant frequency for this circuit?
A. 1.80 kHz B. 1.80 MHz C. 290 Hz D. 290 kHz E. 11.0 kHz
Light of wavelength 400 nm falls on a metal surface having a work function 1.70 eV. What is the maximum kinetic energy of the photoelectrons emitted from the metal?
(c = 3.00 × 108 m/s, h = 6.626 × 10-34 J • s = 4.141 × 10-15 ev • s, 1 eV = 1.60 × 10-19 J) A) 4.52 eV B) 3.11 eV C) 1.41 eV D) 2.82 eV E) 1.70 eV
The speed of the electron in the Bohr theory of hydrogen is:
a. inversely proportional to n. c. proportional to n. b. inversely proportional to n2. d. proportional to n2.
The largest component of ionizing radiation the average American receives is from:
a. radon b. cosmic rays c. TV d. medical x-rays e. terrestrial sources