Ultrasound involves high-frequency sound waves. Sound waves can be used to image internal structures. This is the basis of

The first law of thermodynamics states that heat added to a system is neither created nor destroyed but is transformed ⇒ as it changes into other forms of energy.

This energy transformation diagram represents the energy of a skateboarder moving along a half-pipe. as she skates toward the top of the half-pipe, her original kinetic energy is converted to potential energy and friction. how much of the energy is potential?

Which of the following is not a physical property of mattera. melting pointb. heat of combustionc. viscosityd. boiling point