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

Antibody mediated immune system (amis), Antibody Mediated Immune System (AM...

Antibody Mediated Immune System (AMIS) In antibody-mediated immunity, the antibodies dissolved in blood, lymph and other body fluids bi nd the antigen and trigger a response to

Determine the sieve analysis method of soil texture, Determine the Sieve An...

Determine the Sieve Analysis Method of Soil texture As the name suggests sieve analysis is done using sieves and may give a true distribution of soil particles.  This method i

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

Heterotrophic nutrition, how many types of heterotrophic nutrition in plant...

how many types of heterotrophic nutrition in plants?..

Precautions for fire prevention, PRECAUTIONS FOR FIRE PREVENTION : In the ...

PRECAUTIONS FOR FIRE PREVENTION : In the event of fire or explosion occurring there should be a prearranged plan of the necessary action to be taken. All personnel must be made aw

What are the disadvantages of alkaline soils, What are the Disadvantages of...

What are the Disadvantages of Alkaline Soils As most of the plants can assimilate nitrogen in its nitrate form, and oxidation of ammonium fertilizer can take place only in acid

What is database lock, Question 1 Database design plays important role in ...

Question 1 Database design plays important role in success of CDM. Justify Question 2 What is Clinical data coding? Why coding is required in CDM? Question 3 List

#introducation to sciencetitle.., Evaluating the possible problems of a tec...

Evaluating the possible problems of a technology compared to the expected advantages is known as a ?..

Psychology, discuss the special conflict that erikson believed marked young...

discuss the special conflict that erikson believed marked young adulthood. Then describe how an individual could best resolve this conflict

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