Question

write a detailed essay on energy and power. your essay should include the types of energy and the laws associated with them (500-1500 words)

please make it computer typing thanks

Answer 1

Energy is the ability to do work and work is the transfer of energy from one form to another. In practical terms, energy is what we use to manipulate the world around us, whether by exciting our muscles, by using electricity, or by using mechanical devices such as automobiles. Energy comes in different forms - heat (thermal), light (radiant), mechanical, electrical, chemical, and nuclear energy.

There are two types of energy - stored (potential) energy and working (kinetic) energy. Forexample, the food we eat contains chemical energy, and our body stores this energy until werelease it when we work or play.

1. Potential Energy-Potential energy is stored energy and the energy of position (gravitational). It exists in variousforms.

• Chemical Energy-Chemical energy is the energy stored in the bonds of atoms and molecules. Biomass, petrole-um, natural gas, propane and coal are examples of stored chemical energy.
• Nuclear Energy-Nuclear energy is the energy stored in the nucleus of an atom - the energy that holds the nucle-us together. The nucleus of a uranium atom is an example of nuclear energy.
• Stored Mechanical Energy-Stored mechanical energy is energy stored in objects by the application of a force. Compressedsprings and stretched rubber bands are examples of stored mechanical energy.
• Gravitational Energy-Gravitational energy is the energy of place or position. Water in a reservoir behind a hydropow-er dam is an example of gravitational energy. When the water is released to spin the turbines, itbecomes motion energy.

2. Kinetic Energy - Kinetic energy is energy in motion- the motion of waves, electrons, atoms, molecules and sub-stances. It exists in various forms.

• Radiant Energy-Radiant energy is electromagnetic energy that travels in transverse waves. Radiant energyincludes visible light, x-rays, gamma rays and radio waves. Solar energy is an example of radi-ant energy.
• Thermal Energy-Thermal energy (or heat) is the internal energy in substances- the vibration and movement ofatoms and molecules within substances. Geothermal energy is an example of thermal energy.
• Motion-The movement of objects or substances from one place to another is motion. Wind andhydropower are examples of motion.
• Sound-Sound is the movement of energy through substances in longitudinal(compression/rarefaction)waves.
• Electrical Energy-Electrical energy is the movement of electrons. Lightning and electricity are examples of elec-trical energy.

Grades of Energy-

1. High-Grade Energy-Electrical and chemical energy are high-grade energy, because the energy is concentrated in asmall space. Even a small amount of electrical and chemical energy can do a great amount ofwork. The molecules or particles that store these forms of energy are highly ordered and com-pact and thus considered as high grade energy. High-grade energy like electricity is better usedfor high grade applications like melting of metals rather than simply heating of water.
2. Low-Grade Energy-Heat is low-grade energy. Heat can still be used to do work (example of a heater boiling water),but it rapidly dissipates. The molecules, in which this kind of energy is stored (air and watermolecules), are more randomly distributed than the molecules of carbon in a coal. This disor-dered state of the molecules and the dissipated energy are classified as low-grade energy.