P2(Energy transfer by heating) Flashcards
What is a conductor
A material that allows thermal energy and electric energy to transfer through it
What is an insulator
A material that doesn’t allow thermal energy and electrical energy to transfer through it
What are the best materials to be a conductor
Metals
What are the best materials to be an insulator
Non-Metals
What happens when an object gets hotter
The hotter the object is,the more infrared radiation it emits in a given time
What is blackbody radiation
Radiation emitted by a body that absorbs all the radiation incident on it
What happens to the temperature of an object when it absorbs and emits infrared radiation
-The temperature of an object increases if it absorbs more radiation than it emits
-The temperature of an object decreases if it absorbs less radiation than it emits
What materials are the best absorbers and emitters of infrared radiation
Black coloured materials
What materials are the worst absorbers and emitters
White coloured and shiny materials
What is specific heat capacity
The amount of energy needed to change the temperature of 1kg of a substance
What happens if the object has a large mass when it is heated
The greater the mass of an object the more slowly it’s temperature increases when it is heated
What is the formula for energy transferred for specific heat capacity
What is the formula for specific heat capacity
