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# Problems on wave motion, beats, standing waves

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On quiz 2 below please explain 1-5 better and 7 - 10 better, specifically, what equations are used to solve each question, how are the numbers and equations worked out to see better. Please do the same for quiz 3 for problems 1-7.

https://brainmass.com/physics/velocity/problems-wave-motion-beats-standing-waves-63576

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SOLUTION

QUIZ 2

General

The general equations of a traveling wave is :
y = A sin[(2Î /Î»)x + (2Î /T)t] ....(1)

where : A = amplitude, T = time period, Î» = wave length, - sign represents the wave traveling in positive direction (forward) and + sign implies wave traveling in negative direction (backwards).

Alternative forms of the above equations are :

y = A sin[kx + Ï‰t] ....(2)

where : Ï‰ = 2Î /T = angular frequency and k = 2Î /Î» = wave number (unit m-1)

or y = A sin2Î /Î»[x + vt] .......(3) [arrived at by taking 2Î /Î» out of the brackets and noting that Î»/T = velocity]

where : v = velocity of the wave

In the present case the equation of the wave is given as : y = 4(cm) sin(5Î x + 12Î t) ...(4)

1. ...

#### Solution Summary

This set of problems includes good examples illustrating wave motion, beats and standing waves.

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