Can someone explain to me Einstein's theory of relativity in a simple way ?

When someone slams her books on a table the kinect energy is transferred into vibrations that travel to your ears as sound waves which statement describes the movement of those waves

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

The diagram shows a wave. the quantity shown is the amplitude. this quantity is directly proportional to which of these other quantities? a) energy b) frequency c) period d) wavelength