Recent content by rahulk

Take r vector to be in the direction of k vector. Now, take kx-wt=A (some constant phase) and differentiate it with respect to t . you get dx/dt=w/k which is the velocity of the point whose A(phase) is constant, and hence velocity of wave . It is called phase velocity. Direction of the...

Frictional force depends upon contact between two materials. It arises due to electromagnetic interaction between the atoms of two materials. See http://www.actionurl.com/ia9fh PS: there are plenty of graphic softwares for creating images like inclined planes. Try MS paint, adobe photoshop etc.

It empowers you to work with intensive variable rather than extensive variable http://www.actionurl.com/b1oc6