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July 24, 2014

Homework Help: Physics

Posted by Katelyn on Thursday, December 9, 2010 at 5:19pm.

1. A fisherman's scale stretches 3.6 cm when a 2.5-kg fish hangs from it.
What will be the frequency of oscillation if the fish is pulled down 2.7 cm more and released so that it oscillates up and down?

2. Two trains emit 518 Hz whistles. One train is stationary. The conductor on the stationary train hears a 3.1 Hz beat frequency when the other train approaches.
What is the speed of the moving train?

3.When a player's finger presses a guitar string down onto a fret, the length of the vibrating portion of the string is shortened, thereby increasing the string's fundamental frequency. The string's tension and mass per unit length remain unchanged.
If the unfingered length of the string is l= 65 cm, determine the positions x of the first six frets, if each fret raises the pitch of the fundamental by one musical note in comparison to the neighboring fret. On the equally tempered chromatic scale, the ratio of frequencies of neighboring notes is 2^{1/12

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