The term critical mass refers to the least amount of mass that can
A) sustain a chain reaction.
B) squelch a chain reaction.
C) explode when rapidly brought against a neighboring piece.
D) none of the above
Answer: A
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A sound source of frequency 1 100 Hz moves at 40.0 m/s toward a listener who is at rest. What is the apparent frequency heard by the listener? (speed of sound = 340 m/s)
a. 1 230 Hz b. 970 Hz c. 980 Hz d. 1 250 Hz e. 870 Hz
Determine the magnitude and sense (direction) of the current in the 10-? resistor when I = 1.8 A.
A. 1.6 A right to left B. 1.6 A left to right C. 1.2 A right to left D. 1.2 A left to right E. 1.8 A left to right
Another name for the POLARIZING ANGLE is the
A) Moles angle. B) refracted angle. C) Brewster angle. D) Land angle.
Three devices that use electromagnetic induction in their operation are generators, transformers, and dynamic microphones
a. True b. False Indicate whether the statement is true or false