Medical Dictionary. brachial plexus. noun. Medical Definition of brachial plexus. : a complex network of nerves that is formed chiefly by the lower four cervical nerves and the first thoracic nerve, lies partly within the axilla, and supplies nerves to the chest, shoulder, and arm.
Nonrenewable Sources of Energy. Most of the energy we use comes from fossil fuels, such as coal, natural gas and petroleum. Uranium is another nonrenewable source, but it is not a fossil fuel.Uranium is converted to a fuel and used in nuclear power plants.Once these natural resources are used up, they are gone forever.nergy is the power we use for transportation, for heat and light in our homes and for the manufacture of all kinds of products. There are two sources of energy: renewable and nonrenewable energy.
We will have to use renewable energy like solar, wind and geothermal power and continue to use nuclear power. We also must use electric or hydrogen cars because without fossil fuels we will not have gasoline. Life would be different.ossil fuel is burnt in any transport using the combustion engine, like cars and trucks. Fossil fuel is also burnt in electricity power stations to generate electricity. When you burn fossil fuels it releases mostly CO2 (carbon dioxide) This traps the heat that reaches the earth from the sun.