Energy Transfer 14.2. Methods of energy Transfer Three ways energy is transferred: 1. Conduction- occurs between objects in direct contact. a. Objects.

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Presentation transcript:

Energy Transfer 14.2

Methods of energy Transfer Three ways energy is transferred: 1. Conduction- occurs between objects in direct contact. a. Objects are of unequal temperature. b. Thermal conduction- conduction of heat.

Methods of energy Transfer Three ways cont.: 2. Convection- energy transfer from movement of warm fluids. a. Ex. Heating air with a fire. b. Convection current- cycle of heated air rising then cooling and falling. 3. Radiation- energy transferred through electromagnetic waves. a. Ex. Sunlight

Conductors and Insulators Conductor- a material through which energy is transferred easily. 1. Ex. Metal cooking pans Insulators- a material that transfers energy poorly. 1. Ex. Home insulation, warm clothing

Specific Heat Define- amount of energy required to raise the temperature of 1 kg of a substance 1 K. a. Numbers are different because substances absorb energy differently. B. Examples: 1. Water- 4,186 c 2. Mercury- 140 c