Temperature, Thermal Energy and Heat
What is temperature?
Temperature is the measure of how hot or cold an object is compared to a reference.
How would you explain conduction thermal energy?
The transfer of heat by collisions of particles and movement of electrons within a body.
What are some common types of heating systems?
Forced air system, Radiator system, Electric heating system, Solar heating=Passing solar heating or Active solar heating.
How are thermal energy and temperature related?
They both are determined by the amount of heat present.
How would you explain convection thermal energy?
Transfer through movement of particles. Usually in liquids.
How would you explain the 1st law of thermodynamics?
The First Law of Thermodynamics states that heat is a form of energy, and thermodynamic processes are therefore subject to the principle of conservation of energy. This means that heat energy cannot be created or destroyed.
What is the difference between thermal energy and heat?
Thermal energy is the total energy of a system while heat is transfer of thermal energy.
How would you explain radiation thermal energy?
Is the emission of electromagnetic waves from all matter that has a temperature greater than absolute zero. It represents the conversion of thermal energy into electromagnetic energy.
How would you explain the 2nd law of thermodynamics?
The second law of thermodynamics states that the entropy of any isolated system always increases. The third law of thermodynamics states that the entropy of a system approaches a constant value as the temperature approaches absolute zero.
How can you calculate the change in thermal energy?
Q rep. thermal energy. M rep. the substance mass. C rep. specific heat. And the last two rep. change in temperature. Multiply.
(Q = mcΔT)
How do thermal conductors differ from thermal insulators?
The thermal insulators cannot transfer energy – or conduct heat – where as the thermal conductors specifically meant for doing so.
How would you explain heat engine?
A heat engine is a device used to convert thermal energy, or heat, into mechanical work.
How would you explain specific heat?
Is the amount of heat needed to raise the temp. of 2kilograms of a material by 1 degree C.
How are thermal insulators used to control the transfer of thermal energy?
Thermal insulators are used to control the transfer of thermal energy because it shows the process by trapping the heat.
Give an example of energy conversion.(energy path)
One example of energy conversion is:
Electric Motor (Electrical Energy into Mechanical Energy)