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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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
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