- #1

Gravitino22

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## Homework Statement

Problem 5 from: http://www.swccd.edu/~jveal/phys274/images/hw01.pdf in case you don't understand my text.

A chain of linear mass density u, and length L is hang-

ing from a ceiling. There is a wave moving vertically

along its length. a) Is the propagation speed constant?

(Justify your answer.) b) Show that the amount of

time it takes the wave to move along the full length is

given by

t=2[tex]\sqrt{\frac{L}{g}}[/tex]

## Homework Equations

String waves speed: [tex]\frac{u}{T}[/tex][tex]\frac{\delta ^{2}y}{\delta t^{2}}[/tex]= [tex]\frac{\delta ^{2}y}{\delta x^{2}}[/tex]

## The Attempt at a Solution

Ive spent 2 hours trying to use the forumula for a string waves speed but I really don't understand the concept of solving the partial differential equations.

I know that the propagation speed is not constant because of gravity but i don't know how to apply that to the formula.

btw used delta for partial derivatives.

Thanks a lot :)

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