All Flashcards
What are the three thermal processes of energy transfer?
Conduction, Convection, and Radiation.
Describe the process of energy transfer at the atomic level.
Higher-energy atoms transfer energy to lower-energy atoms during collisions.
Describe the direction of energy transfer between two systems at different temperatures.
Energy always flows from the hotter system to the cooler system.
Explain how thermal equilibrium is achieved between two systems in thermal contact.
Energy transfers from the hotter system to the cooler system until both systems reach the same temperature, at which point the rate of energy transfer is equal in both directions.
What is the effect of increasing the temperature of a metal rod?
The metal rod will undergo thermal expansion, increasing in length and volume.
What happens when two objects at different temperatures are placed in thermal contact?
Energy flows from the hotter object to the cooler object until they reach thermal equilibrium.
What is the effect of high thermal conductivity in a material used for cooking?
The material will quickly and evenly spread heat, allowing for efficient cooking.
What is the effect of low thermal conductivity in building insulation?
It slows down heat transfer, keeping heat in during winter and out during summer.