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It is an inexhaustible and population free source of energy. This energy maintains temperature of the earth. It causes current in the atmosphere and in ocean. The total solar energy reaching on the earth's surface is 10 16 watts, whereas worldwide power demand for all needs is 1013 watts. So the sun gives us 1000 times more energy than we require. Solar energy can be utilized by two different routes.
i. Solar thermal route:
In this route, various devices are used to convert solar heat energy into mechanical, chemical or electrical energy Eg Solar cooker, solar dryer, solar heater etc.
2. Photovoltaic conversion routes:
In the route, solar energy is directly converted into electricity by using silicon solar cells. These cells are of many types such as mono crystalline cells, amorphic solar cell etc. this electricity can be used for lighting homes, building, running motor pumps.
Crustacea - Feeding and Digestion in Arthropods Branchiopods (Anacostraca) give a good instance for filter feeding mechanism. The appendages are of foliaceous type (leaf-like)
Q. How can the hypothesis that asserts that chloroplasts as well as mitochondria were primitive prokaryotes that related in mutualism with primitive anaerobic eukaryotic cells be c
What type of metamorphosis do spongs go through is it reteogressive?
Which is the type of nitrogen waste eliminated by beings of the class Reptilia? These beings excrete mainly uric acid. This substance is less toxic than ammonia and it can be k
Using high temperature carbonization, metallurgical coke (hard coke) can be prepared by two processes. 1. Beehive coke oven process. 2. Otto-hoffmann's by-product
Describe the Features common in ventricular outflow obstruction ? An ejection systolic murmur (ESM) due turbulent flow of blood through the obstruction. Hypertrophy of the cham
(i) Name one fibrous and one globular protein. fibrous globular (ii) Outline the difference in structure between a fibrous and a globular protein. ' shows the ef
Green leaves give off oxygen in sunlight Place some water weed under a funnel in a beaker of water reverse a test tube full of water over the tube of the funnel. Leave the appa
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