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Fish are hung on a spring scale to determine their mass (most fishermen feel no obligation to report the mass truthfully).
(a) What is the force constant of the spring in such a scale if it stretches 7.90 cm for a 10.5 kg load?
N/m
(b) What is the mass of a fish that stretches the spring 5.50 cm?
kg
(c) How far apart are the half-kilogram marks on the scale?
mm
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A 125 g wire is held under a tension of 218 N with one end at x = 0 and the other at x = 12.0 m. At time t = 0, pulse 1 is sent along the wire from the end at x = 12.0 m. At time t = 25.5 ms, pulse 2 is sent along the wire from the end at x = 0. A..
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