A brass bar twisted by torques T acting at the ends has the follow- ing properties: L 5 2.1 m, d 5 38 mm, and G 5 41 GPa. The torsional stiffness of the bar is approximately:
(A) 1200 N?m
(B) 2600 N?m
(C) 4000 N?m
(D) 4800 N?m
(C) 4000 N?m
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In this figure the shape of a plucked guitar string (a) is the superposition of the first five harmonics (b-f). What does the listener hear when a guitar string is plucked?
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