Standing Sound Waves: An organ pipe open at both ends has a length of 0.80 m. If the velocity of sound in air is 340 m/s, what is the frequency of the second harmonic of this pipe?
A. 213 Hz
B. 425 Hz
C. 638 Hz
D. 850 Hz
Answer: B
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The molecular weight of nitrogen is 28 g/mol. What is the rms speed of nitrogen molecules at 8.0°C?
A) 450 m/s B) 500 m/s C) 550 m/s D) 600 m/s E) 650 m/s
The maximum shift in wavelength in Compton scattering is what multiple of the Compton wavelength (h/miss)?
A. 0.5 B. 1 C. 2 D. 4 E. unlimited
In the development of a terrestrial planet, the stage of ____ when dense material settled to the core and less dense to the outer parts
a. differentiation b. cratering c. glaciation d. accretion e. flooding
Lenz's Law: A coil lies flat on a tabletop in a region where the magnetic field vector points straight up. The magnetic field vanishes suddenly. When viewed from above, what is the sense of the induced current in this coil as the field fades?
A. The induced current flows counterclockwise. B. The induced current flows clockwise. C. There is no induced current in this coil. D. The current flows clockwise initially, and then it flows counterclockwise before stopping.