Sources of heat energy
In science we are learning about the 5 sources heat energy is made of.
The 5 sources are: Mechanical Energy, Radiant Energy, Nuclear Energy, Electrical Energy, and Chemical Energy.
Mechanical Energy: The energy a substance or system has because of its motion.
The three types of forces that can be used to convert mechanical energy into heat are:
a) Friction: Is caused when two surfaces rub against each other.
b) Distortion: Is a force that causes objects to change their shape.
c) Compression: Is a force that acts to squeeze matter into a smaller space.
Radiant Energy: This is energy that travels in wave like rays.
radiant energy is the changing of electrons. it can travel through any substances like air, glass, liquid, and space.
here is a example of radiant energy.
the sun passes radiant energy to earth.
here are some everyday examples of radiant energy:
- campfires
- microwaves
- heat from stove or oven
- heat from a over-used computer
Nuclear Energy: Nuclear energy is produced by fission of uranium. this is the splitting of a uranium atoms.
In fission, nuclear energy produces heat energy. Fission's heat is used to generate electric power in locations worldwide.
this is how nuclear plants look like:
Electrical Energy: Energy carried by moving electrons in an electric conductor.
Electrical energy is often converted to heat energy.
Electrical energy may be produced by:
a) Converting the mechanical energy of running water as in a hydro generating station.
b) Converting the heat energy of nuclear reactions or burning fossil fuels. the heat is used to produce steam which turns the generators to produce electricity.
here is a picture of electrical energy. this bulb provides energy and heat.
Chemical Energy: Energy stored in bonds between atoms and molecules.
Chemical reactions may be used to produce energy. In a chemical reaction new materials are produced.
In a battery, chemicals react to produce new chemicals, electrical energy, and heat energy.
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