Energy Transformations and Heat

Heat Energy Def’n: amount of thermal energy that is transferred from one place to another through a temperature difference

Heat # of particles (how much mass). Less mass allows substance to get hot faster Degree of agitation (movement) of the particles High agitation = high temperature Low agitation = low temperature

Temperature Def’n: degree of agitation of particles It doesn’t matter how much mass you have E.g.

Heat Transfer

Heat Transfer

Heat Transfer Heat is transferred from warm to cold until equilibrium is reached Cold energy does not exist. Cold is simply the absence of heat Ex. 2 buckets

Recap Heat depends on: mass and agitation Temperature depends on: agitation You transfer heat, but you measure temeprature You cannot transfer cold

Energy Transformations

What is Energy? What is it good for? What do we use it for? How is it created?

Types of Energy Potential versus Kinetic Potential: Energy is stored in an object at rest Kinetic: Energy of a moving object

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Energy Types Chemical: energy stored in a substance that can be released/absorbed when bonds are broken Electric: energy made available by the flow of electric charges Sound: energy contained and transported by sound waves Kinetic: energy of movement

Energy Types Potential: stored energy due to its position Mechanical: potential energy combined with kinetic energy Thermal energy: energy resulting from random motion of particles due to heat Radiation energy: energy transported in electromagnetic waves

Energy Types Wind: energy generated from wind Elastic energy: potential energy stored as a result of deformation of an elastic object Hydraulic: energy resulting from flow of water Nuclear: energy stored in the nucleus

Energy Transfer Def: The movement of energy from one place to another

Energy Transformation Def’n: Changing of energy from one form to another