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reza1

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for the wave function y(x,t) = A / (x-vt)^2+b ------> What is the importance of 'b' and what is its meaning?

**A Uniform Circular Hoop of string of mass m and radius r is rotating in the absence of gravity. Its tangential speed is Vo. Its length is deltax=r*delta(pheta)**

**Find the Tension in the Spring**

Linear Density= u

Length = x

Mass = u * delta x

ac=centripetal acceleration

(u*deltax)ac=2Ft + sin1/2(pheta)

(u*r*delta(pheta))Vo^2/r=2Ft1/2(pheta) ---> Assuming small angle for Sin

uVo^2= Ft

**Find the speed of a wave traveling on the string**

Do i have to find the 2nd derivative of ASin(kx-wt) for the velocity?Another Question

**Two strings of Linear Density u1 and u2 are tied together at x=0 and stretched along the x-axis with a tension F. A wave given by y(x,t)=Asink1(x-v1t) travels in the string of linear density u1. When it meets the knot it is both reflected, giving a wave Csink1(x+v1t) and transmitted giving a wave Bsink2(x-V2t)**

**What is the Physical Interpretation of the assumption that k1v1=k2v2**

Just need some help to start this question

**What is the Physical interpretation of the assumption that the strings have the same slope at the knot**

if the length and frequency of the knot is held constant and the tension varies, both strings will have the same slope ? ---> I am not to sure about this Help on any of these questions will be much appreciated thank yiou