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Transcript of Energy
What is energy?
Energy is the strength needed for sustained physical or mental activity, Energy can't be created or destroyed, it can only be transformed.
Types of energy
There are two main types of energy: kinetic and potential. Kinetic energy is moving energy while potential is stored. Under these two categories, there are many other forms of energy; chemical, electrical, elastic, sound, solar, light, heat, gravitational and nuclear.
Transformation of energy
Energy transformation is an important theory in the application of the physical sciences. It's defined as a process of changing one form of energy to another. This process is happening all the time, both in the world and within people. When people consume food, their body utilizes the chemical energy in the bonds of the food and transforms it into mechanical energy, a new form of chemical energy.
Energy Transformation in a Hydropower Station
The End!! (:
Elastic energy is potential energy stored as a result of deformation of an elastic object, such as the stretching of a spring or rubber. Elastic energy can be used in rubber bands, trampolines and springs.
Heat is a form of energy which is transferred by a difference in temperature. It is the flow of energy from a warm object to a cooler object. Heat energy is used to keep warm (fireplaces), prepare food (stoves, ovens), and it is used in manufacturing.
Gravitational energy is the energy associated with the gravitational field. Examples are aeroplanes, hot air balloons and anything else above the ground.
Chemical energy is the result of atoms and molecules interacting. Chemical energy can be found in lots of things including batteries, food, plants, candles, matches and fuels such as gas.
Nuclear energy is the energy released by a nuclear reaction. It is also known as atomic energy.
Electrical energy is the presence and flow of an electrical charge. Electrical energy is the result of the interaction of subatomic particles with an electromagnetic force. Examples where electricity is used are light bulbs, air conditioning, microwaves, televisions and computers.
Solar energy is radiant energy emitted by the sun. Solar energy is used to provide electricity for our homes, businesses and industries.
Sound energy is the form of energy associated with the vibration or disturbance of matter. Some examples of sound energy are musical instruments, an aeroplane taking off, whispers and conversations.
Light energy is used everywhere including solar cells, producing electricity, solar power, light bulbs, candles, and anything that produces light.
Electrical - plug in
bread to toast
P.E. of water
(top of river)
K.E. of water
USED AT HOME
current in wire
K.E. of turbine