Hi. I'm having a problem understanding how to solve non-linear homogeneous equations. For example, (x^{}2+y^{}2)dx +xydy = 0 ; x=1, y=1
I understand that y=xv, v=y/x, and dy=xdv +vdx
To sub in,
x^{}2 + (v^{}2x^{}2)dx +x^{}2v(vdx+xdv) = 0
Here's where I get lost:
x^{}2[(1+v^{}2)dx...
Hi. I hope someone can help. Here is the problem:
[Pennies are made of zinc coated with copper. Copper has a work function of 4.7eV. The ozone layer blocks nearly all solar radiation with wavelength shorter than 320nm, but a very small amount of 200nm light still manages to reach the Earth's...