• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Analysing different types of Energy.

Extracts from this document...

Introduction

Energy In order for work to be done by machines or human beings, they need to possess energy. It is measured in the same units as work, namely joule (I) with practical values often being expressed in kilojoule (kJ), megajoule or gigajoule (GJ). Energy, like work, does not possess direction and is as quantity. It can take several forms and may be converted from one form to another. Kinetic energy This is the energy that a body possesses because of its motion. The greater speed at which it is moving the greater its kinetic energy. The energy in if case is equal to the work done by the body in coming to rest. A hammer possesses kinetic energy as it strikes a nail and this energy enables it to do work driving the nail into a piece of wood. Linear and angular motion both give rise to kinetic energy. Potential energy This is the energy that a body possesses because of its position in a particular type of field: gravitational, electric, magnetic or nuclear. Gravitational potential energy for example equals the amount of work that the body can as it falls towards the Earth under the pull of gravity. ...read more.

Middle

The amount of energy available from the fuel is called its calorific value and it is usually quoted for 1 kg. In the case of gaseous fuels it may be given in terms of volume. The energy released during combustion may be used directly for heating purposes or it may be converted to other forms. Electrical energy Electricity is not a form of energy itself but it is often a very convenient means of transferring energy from one body to another. We use the term 'electrical energy' for the energy being transferred. The energy transferred in this way can be stored in electrochemical batteries as potential energy. Sources of Energy Solar energy Enormous amounts of energy reach the outer atmosphere of the Earth from the Sun. The quantity reaching the surface depends upon the ozone layer, dust, clouds and latitude. Even in temperate latitudes it can amount to 500 W/m2. This energy is readily available for producing hot water and spa heating using simple solar panels. Installation costs are high, however, and the energy available decreases in winter when the requirement is greatest. ...read more.

Conclusion

The tidal mill at Woodbridge in Suffolk had been working for 200 years when it closed in 1957 and the first such mill on the site was built in about 1170. Hydroelectric power In mountainous countries substantial amounts of power can be generated from the potential energy of water stored by dams. Although the construction costs can be very high the direct cost of production is very small. Wave energy The vertical motion of the sea can be utilised to generate power in several ways. One system uses the relative movements of floating rafts to convert the wave energy. Very large amounts of energy are theoretically available, particularly in the winter when the requirement is greatest. Geothermal energy We know that very high temperatures exist within the Earth and in some places heat in practical quantities is available at the surface. Hot springs have been used at least since Roman times. There are installations in several countries, which use geothermal energy to generate electricity. Wind energy Wind power has been harnessed for many centuries and is now seriously considered for the generation of electricity. We can make a rough estimate of the power available from a windmill by considering the kinetic energy of the air approaching the circle swept out by the blades. Steven Mckibbin 1 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Energy, Respiration & the Environment section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Energy, Respiration & the Environment essays

  1. Marked by a teacher

    To make sure we have plenty of energy in the future, it's up to ...

    4 star(s)

    Hydropower today can be found in the mountainous areas of California where there are reservoirs and along major rivers.

  2. Why the Body Needs Energy? Every living cell within the ...

    Reference: (Tucker Louise anatomy and physiology 1988) http://www.blobs.org/science/article.php?article=54 Website viewed on 28 / 4 / 2008 Arteries An artery is a blood vessel which leads away from the heart, therefore the pressure within the artery will be very high, however the tunica media of the vessel which hold the muscle

  1. Investigating the effects of different lead chloride concentrations on the growth of cress seedlings

    ABA only affects a plant in high concentrations. In high concentrations, ABA causes the stomata in plant cells to close, which reduces loss of water vapour from the leaf. The guard cells control the opening and closure of the stomata.

  2. out how different concentrations of the enzyme pectinase affect the degradation of the substrate ...

    As the enzyme concentration increases, the rate of reaction also increases. This is because there will be more active sites that can catalyze substrates; thus causing an increase in the rate of activity. Therefore the enzyme concentration and the rate of reaction have a directly proportional relationship.

  1. The Pancreas is a large gland that forms part of the Endocrine System, but ...

    The acinar and duct cells both from a continuous layer, which separates the interstitial space of the pancreas. This interstitial space is the space, which is in between the cells but outside the blood stream from the lumen of the gland.

  2. formation, extraction and separation of the crude oil.

    2. We measured 5cm between the burner and the boiling tube. 3. We also measured 5cm� of water into the boiling tube. 4. Then we took the start of the temperature. 5. Then we lighted the burner and started the stop watch at the same time.

  1. Zonation on the Rocky Shore at Starfish Bay.

    Note down any specific features of interest at each quadrat section. 7. Between each station, record the changes in the vertical height so that a profile can be drawn. 8. Back in the laboratory, rinse the salt water off all the equipment.

  2. The Ozone Layer.

    when energy absorbed from a very high-energy photon causes an atom to completely lose an electron If a molecule achieves photodisassociation (or ionisation) then the light energies being absorbed correspond to UV light. It would also be a higher energy UV than that required for excitement.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work