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

Explain the functions of unicellular organism, Explain the Functions of Uni...

Explain the Functions of Unicellular Organism You might wonder what functions a single-celled organism is capable of performing. Surprisingly, a unicellular organism is able to

Define macrophages - csf, Define Macrophages - CSF It is produced by m...

Define Macrophages - CSF It is produced by macrophages, fibroblasts and endothelial cells. They specifically stimulate precursors of macrophages. It also enhances effector res

Environmental accidents can be of various kinds, Question 1 What are th...

Question 1 What are the sources of water pollution? List some measures that can help overcome the problem of water pollution Question 2 Environmental accidents can b

Define albumin in the urine, Define Albumin in the Urine Albumin in the...

Define Albumin in the Urine Albumin in the urine generally means leaking of the plasma albumin through the inflamed renal glomerulus (glomerulonephritis). It may also be presen

Planets., What are all the planets in our solar system?

What are all the planets in our solar system?

Decline of the bronze age civilisation, Decline of the Bronze Age Civilisat...

Decline of the Bronze Age Civilisation: We find that the great developments in production methods that came with the rise of early cities lasted only f6r a few centuries. The

Solar system, solar system At night you can see very many stars in the...

solar system At night you can see very many stars in the sky. But during the day, only one star is .visible, and that is  the Sun. This is not because there is anything extrao

Poisons-storage of chemicals, Poisons : It is essential that all dangerous...

Poisons : It is essential that all dangerous substances, such as cyanides, are always kept under strict control. Steps to ensure such control are as follows: i) All substances

#fatty acid biosynthesistitle.., Ask quesdifference between prokaryotic and...

Ask quesdifference between prokaryotic and eukaryotic fatty acid synthesistion #Minimum 100 words accepted#

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