Why is the kinetic energy given by E=\frac{1}{2}mv^2
yet Einstein's energy equation is E=mc^2 ?
Why is there a different constant (ie \frac{1}{2} and 1)?
Hi I am having a bit of difficulty working with plane polar co-ordinates.
We have:
r^2 = x^2 + z^2
x = r cos \theta
z=r sin \theta
I wish to find \frac {\partial r} {\partial x}
Using r^2 = x^2 + z^2
We have:
\frac {\partial (r^2)} {\partial x} = \frac {\partial (x^2)}...