d^2phi/dx^2= -2AB^2tanh(Bx), correct?
Now I have gotten the equation
tanh(Bx)[2AB^2-A+A^3tanh^2(Bx)]=0
I set 2AB^2-A+A^3tanh^2(Bx)=0
tanh(Bx)= sqrt[2B-1]/A
But now what? Was I supposed to change the tanh^2(Bx) into 1-sech^2(Bx)?
Homework Statement
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I have been given a second order nonlinear differential equation, and I have also been given the general solution with constants A and B. I am supposed to find the constants A and B. The solution represents a fermion at rest, since the solution does...
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Homework Statement
A ball starts from rest and rolls down a hill with uniform acceleration, traveling 130m during the second 6.0s of its motion.
How far did it roll during the first 6.0s of motion?
Homework Equations
I guess:
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The Attempt at...
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It reads:
There are...
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