Power is the rate of doing work. Work is done only if the object is moved. Heat Measurements Heat is the transfer of energy. The properties of heat can be described by the Laws of Thermodynamics. Thermodynamics is the study of the relationships between heat and other forms of energy.
Heat always flows from a warmer body to a cooler body.
Phases of Matter A phase indicates the way in which particles group together. The phase of matter is determined by the forces acting on the molecules and the energy associated with the substance. The phases or states of matter are solid, liquid, gas, and plasma. The Kinetic Theory states that molecules are in constant motion and undergo perfectly elastic collisions. The average kinetic energy of a particle is proportional to its temperature.