Hello!
I know to write the equation for a harmonic wave moving along the x axis in a positive direction (with Y(0,0)=0):
Y= A sin (kx - wt)

How do I write it to describe a wave travelling in an x=y direction with z=0?
I guessed:
Y = A sin [kx (i+j) -wt]
... but I suspect that's rubbish.

Thank you.

I've looked through all 3 of my physics textbooks and still don't get how to solve this problem. Please help.

At the highest point in its path, an arrow is traveling at a speed of 10 m/s. Assuming that its acceleration is 9.81 m/s^2 vertically downward, how fast would it be moving .5 s later? .5s earlier?

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Wavenumber k=nPi/L, where n is number of particles and L is length of one side of a box.

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Hi, I am embarrassed to have to resort to this, but I have been stuck on these two problems for (literally) two hours.  Can anyone help ( Read more... )

Could you check/help me on these physics problems?

http://dhilbert.wordpress.com/2007/04/23/physics-problems/

THanks

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I’m having trouble with this problem. I just don’t see how the expression that I end up with can be reduced to a familiar formula for entropy ( Read more... )