Solar energy, Science

Assignment Help:

Solar energy:

The energy we get today from the fossil fuels like coal, is in reality sun's energy,  trapped in them millions of years ago. Plants make their food and grow because they use solar energy for photosynthesis. Millions of years ago, huge forests got buried in the earth's crust and under great pressure and temperature,  they were converted into coal or oil. Hence coal and oil are  called fossil  fuels. Solar  energy is the great source  for production of vegetation which serves as food and fuel for us. However, nowadays, we have learnt to trap solar energy for various purposes. Solar energy can be used directly to give us hot water during winter, or run a refrigerator. It can be used for heating rooms in colder regions. It can also be used, with the help of a "photocell" to produce electricity for driving vehicles and illumination of streets. In a desert like Rajasthan, the earth's surface receives solar energy at the rate of 200 watts per square metre per hour. Since this is an unfailing source of energy, it would be a great advantage to develop cheap and efficient photocells or photovoltaic devices  to harness solar energy. A feature of using solar energy is  that it can be generated where needed. Solar cookers are being used  in many homes to cook food. Photocells are  also becoming common, though their efficiency has to be improved and their price brought down.  

2176_Solar energy.png


Related Discussions:- Solar energy

Sterilizing water by boiling, Sterilizing water by boiling The presence...

Sterilizing water by boiling The presence of tiny living plants and animals makes water inappropriate for drinking. Such forms of life can only be seen by a microscope. We can

Procedure of earthing in an appliance, Procedure : There are two parts of ...

Procedure : There are two parts of this activity. Part A deals with the assembling of the continuity testing device (CTD) and Part B deals with checking the effectiveness of earth

Procedure electricity and water in a laboratory, PROCEDURE A. For Gas ...

PROCEDURE A. For Gas Supply Visit the LPG gas store room 1 cracking plant along with your counsellor or the lab in charge' and note the way supply of gas is regulated. It

Name the primary minerals present in an igneous rock, a)  Name the primary...

a)  Name the primary minerals present in an  igneous rock.  a )  Quartz (SiO2), feldspars, amphiboles, pyroxenes and micas are the most common primary minerals in igneous  rock

Broad area of scientific activity, describe the factors which decide the br...

describe the factors which decide the broad area of scientific activity

Define age related changes in blood, Define Age Related Changes in Blood ...

Define Age Related Changes in Blood Blood: Here the haemopoiesis (the formation of blood cells) slows down. Fatty marrows replace the heamopoietic (red) marrow. Thus, the proli

Explain the vasomotor center - feature of medulla, Explain the Vasomotor ce...

Explain the Vasomotor center - Feature of Medulla The vasomotor center is found in medulla. It controls diameter of the blood vessels especially the ones which have smooth musc

Define the uses of buffer method, Define the uses of buffer method The ...

Define the uses of buffer method The buffer method of Shoemaker and coworkers for determining lime requirement is being widely used in India. In this method 5g of soil is added

Acid rain, Acid Rain: A side effect of air pollution is acid rain, whic...

Acid Rain: A side effect of air pollution is acid rain, which is now of common occurrence. You might have seen, that some industries build very tall smoke stacks  to protect  t

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd