Introduction
Energy is one of the most fundamental parts of our universe.
We use energy to do work. Energy lights our cities. Energy powers our vehicles, trains, planes and rockets. Energy warms our homes, cooks our food, plays our music gives us Figures on television. Energy powers machinery in factories and tractors on a farm.
Energy from the sun gives us light during the day. It dries our clothes when they're hanging outside on a clothes line. It helps plants grow. Energy stored in plants is eaten by animals, giving them energy. And predator animals eat their prey, which gives the predator animal energy.
Everything we do is connected to energy in one form or another.
Energy is defined as: "the ability to do work."
When we eat, our bodies transform the energy stored in the food into energy to do work. When we run or walk, we "burn" food energy in our bodies. When we think or read or write, we are also doing work. Many times it's really hard work!
Cars, planes, boats and machinery also transform energy into work.
Work is the application of a force over a distance. Work is equal to the product of the force and the distance through which it produces movement. Although both force and displacement are vector quantities, having both magnitude and direction, work is a scalar quantity, having only magnitude.
If the force acts in a direction other than that of the motion of the body, then only that component of the force in the direction of the motion produces work. If a force acts on a body constrained to remain stationary, no work is done by the force. Even if the body is in motion, the force must have a component in the direction of motion.
The forms of energy are included:
- Electricity
- Fossil Fuels - Coal, Oil and Natural Gas
- Nuclear Energy
- Wind Energy
- Solar Energy
- Geothermal Energy
- Biomass Energy - energy from plants
- Hydro Power and Ocean Energy
- Hydrogen fuels
We will also look at turbines and generators, at what electricity is, how energy is sent to users, and how we can decrease or conserve the energy we use. We'll look at the "newer" forms of energy... and take a look at energy in the future. Finally We look at the renewable energy in the China ,Germany and Russia.
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