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

Cholagouge action and absorptive function of bile, Cholagouge action and Ab...

Cholagouge action and Absorptive function of bile Cholagouge action: Bile acts as its own stimulus. Bile salts are absorbed from the intestine, carried to the liver and stimula

What is rancidity, What is rancidity This results from  the  formation ...

What is rancidity This results from  the  formation  of  aldehyde due  to the  oxidation of unsaturated glycerides or by the liberation of fatty acids due to hydrolysis. In

Verification of stock register , VERIFICATION OF STOCK REGISTER : A stock ...

VERIFICATION OF STOCK REGISTER : A stock register is an important component of any official establishment in which records related to purchase, use and maintenance of all the item

Aids, AIDS: You have learnt about infectious diseases. For centuries, d...

AIDS: You have learnt about infectious diseases. For centuries, death from infectious diseases was common and whole populations were often affected.  One of the remarkable achi

Matter, what is meaning of solid'' liguid'' gases?why eresers float in wate...

what is meaning of solid'' liguid'' gases?why eresers float in water?why deos paper sink in water?

Check-in sequences for treatment of the spillage site , Check-in Sequences ...

Check-in Sequences At the time of opening the lab, the following need to be kept in mind: 1.  Ensure that the door locks have not been tampered. If any tampering is detected

Define age related changes in excretory system, Define age related changes ...

Define age related changes in Excretory System There is a progressive decrease in the number and size of nephrons fiasic unit of the kidney). There is a 10% decrease in renal p

Nutrition, 1. A patient with Chronic Kidney Disease (Stage IV), who ma...

1. A patient with Chronic Kidney Disease (Stage IV), who makes very little urine, presents to the hospital with severe nutritional deficiencies.  You are starting her

Intrusion into the water cycle, Intrusion into the Water Cycle: Water m...

Intrusion into the Water Cycle: Water management is one of  the leading concerns of man  today. The natural water cycle has not been able to compensate for the effects of human

A tropical storm will be declared a hurricane when, A tropical storm will b...

A tropical storm will be declared a hurricane when: There is evidence of eye formation and sustained wind speeds of 74 mph

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