______ is a measure of audio quality.
A. Stream rate
B. Playback value
C. Optimization
D. Bit depth
Answer: D
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Assuming the Hubble constant is (21 km/s)/(106 ly), what is the recession speed of a galaxy 300 million parsecs away? (1 parsec = 3.26 ly)
a. 4200 km/s c. 640 km/s b. 21,000 km/s d. 7000 km/s
Heat Engines: A heat engine receives 7000 J of heat and loses 3000 J in each cycle. What is the efficiency of this engine?
A. 57% B. 30% C. 70% D. 43%
A math book and a science book are tied together with a length of string. With the string taut, one book is pushed off the edge of a table. As it falls, the other book is dragged horizontally across the table surface
With no friction, acceleration of the books is A) zero. B) g/2. C) g. D) between zero and g. E) greater than g.
Which statement best describes an extrasolar planet? a. A planet that orbits closely to the Sun in our Solar System
b. A new planet not previously accounted for within our Solar System. c. A planet smaller and icier than the other planets in our Solar System. d. A planet discovered orbiting another star outside of our Solar System. e. A planetary body that orbits just beyond Neptune.