A 40.0 cm long organ pipe is filled with air and is open at both ends. The velocity of sound in air at0
is 331 m/s. If the temperature of the air increases by 10
then what is the frequency of the fundamental mode?
A. 367 Hz
B. 395 Hz
C. 401 Hz
D. 421 Hz
E. 480 Hz
D. 421 Hz
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Most of the injuries caused by the Chelyabinsk event in 2013 were caused by
A) smoke inhalation B) UV radiation from the fireball C) glass shattered by the shock wave D) the sonic boom as the object passed through the Earth's atmosphere
Dispersion results because the speed of light in a transparent medium varies with frequency
a. True b. False Indicate whether the statement is true or false
A laser pulse of duration 25 ms has a total energy of 1.4 J. If the wavelength of this radiation is 567 nm, how many photons are emitted in one pulse? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
A) 4.8 × 1019 B) 3.2 × 1017 C) 9.9 × 1019 D) 4.0 × 1018 E) 1.6 × 1017
A person with normal eyesight uses a converging lens of focal length 10 cm as a magnifying glass to finish an engraving job. To see detail, he holds the lens very close to his eyes. At what minimum distance from the job must he hold the lens?
A) 20 cm B) 30 cm C) 14 cm D) 9.4 cm E) 7.1 cm