Which of the following not generally thought of as matter?
A) light
B) trees
C) air
D) clouds
E) rain
Answer: A
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A string with a mass per length of 2.00 gm/m is stretched with a force of 150 N between two points that are 0.500 m apart. The fundamental frequency of the stretched string is in tune with the fundamental frequency of an organ pipe filled with air and open at both ends. The velocity of sound in air at 0
is 331 m/s. What is the length of the organ pipe?
A. 50.2 cm B. 55.2 cm C. 57.5 cm D. 60.4 cm E. 65.3 cm
Write the equation of a wave, traveling along the +x axis with an amplitude of 0.02 m, a frequency of 440 Hz, and a speed of 330 m/sec
a. y = 0.02 sin [880?(x/330 ? t)] b. y = 0.02 cos [880? x/330 ? 440t] c. y = 0.02 sin [880?(x/330 + t)] d. y = 0.02 sin [2?(x/330 + 440t)] e. y = 0.02 cos [2?(x/330 + 440t)]
From the following statements regarding the ratio of the molar specific heat at constant pressure to the molar specific heat at constant volume, Cp/Cv, the only correct one for an ideal monatomic gas is
A) = 1. B) > 1. C) < 1. D) Cp/Cv is sometimes more than 1, sometimes less than 1, but never equal to 1. E) Cp/Cv is sometimes more than 1, sometimes equal to 1, but never less than 1.
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