Which of the following best defines the sampling rate?
A. The number of samples obtained per second during the recording process.
B. The bit depth of an audio file.
C. The amount of background noise in an audio file.
D. The speed of playback of an audio file.
Answer: A
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The ozone layer
a. reflects all EM waves. b. reflects high frequency radio waves. c. reflects low frequency radio waves. d. is responsible for the greenhouse effect. e. absorbs ultraviolet light in sunlight.
A 2.00 kg mass is connected to a spring with a spring constant of 9.00 N/m. The velocity is given by the expression v(t) = 10.0 cm/s sin
What is the maximum acceleration of the simple harmonic motion?
A. 17.5 
B. 21.2
C. 25.2
D. 30.5
E. 36.7
Which of the following is true of redshift?
A) Radiation that comes from great distance has tremendous redshift. B) Radiation from the hot gas of the big bang is calculated to have a redshift of about 10. C) The redshifts of different galaxies imply that these galaxies are moving toward each other. D) The redshifts of the most faint and distant galaxies known to date are about 1100.
Of the following mesons, which is its own antiparticle?
a. K– b. ? c. ?+ d. none of those given