If one sound wave has twice the amplitude of another the first sound is

if one wave has a negative displacement, the displacements would be opposite each other, so the displacement where the waves overlap is less than it would be due to either of the waves separately.

-causes a moment where the net displacement of the medium is zero. energy of waves hasn't vanished, but it is in the form of the kinetic energy of the medium

-then both emerge unchanged

Explanation:

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length

not moving. pos accel,