All waves transmit energy force sound heat

Energy

Explanation:

Waves are disturbances that transmit energy through matter and/or vacuum, without transport of matter.

There are essentially two types of waves:

- Electromagnetic waves: these waves are produced by the oscillations of electric and magnetic fields, which oscillate perpendicularly to the direction of travelling of the wave. These waves do not need a medium to travel through, so they can also propagate through a vacuum (e.g. into space)

- Mechanical waves: these waves are produced by the oscillations of the particles in a medium, which can oscillate perpendicularly or parallel to the direction of travelling of the wave. These waves, instead, need a medium to propagate, so they cannot travel through a vacuum. An example of mechanical waves are sound waves.

Both types of waves carry energy, so the correcto choice is:

All waves transmit energy

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered