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Unformatted text preview: Exam Phys 2C, Quiz 6 Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) What of the following is a WRONG statement A) When an ideal gas is isothermally compressed, the speed of sound in it increases B) A 1 dB increase in sound level may correspond to different absolute increments in sound intensity (measured in W/m 2 ) C) In a sound wave in a gas the displacement and pressure have peaks at different points D) dB level of sound can be negative 2) What of the following is a WRONG statement? A) The speed of sound waves emitted by a moving source is the same as by the source at rest B) An evidence for expansion of the universe is shift towards greater wavelengths in the spectra of distant galaxies C) If the source of a sound wave and the observer move at the same velocity, the wavelength measured by the observer is different from when they both are at rest D) The wavelength of an electromagnetic wave measured by a moving observer is the same as by the...
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This note was uploaded on 11/18/2011 for the course PHYS 2C PHYS 2C taught by Professor Groisman during the Spring '11 term at UCSD.
- Spring '11