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Amar Kumar 8 years, 3 months ago
Evaporation : It is the process of a liquid changing into a gas. An example of evaporation is water turning into steam.
Posted by Deepraj Kourav 8 years, 3 months ago
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Amar Kumar 8 years, 3 months ago
A transistor is a three terminal semiconductor device used to amplify or switch electronic signals and electrical power. A voltage or current applied to one pair of the transistor's terminals controls the current through another pair of terminals. Three terminals are emitter , base and collector.
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Amar Kumar 8 years, 3 months ago
Sunlight, chlorophyll in plant leaves, water and carbon dioxide are required for photosynthesis.
Posted by Isha Bansal 8 years, 3 months ago
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Amar Kumar 8 years, 3 months ago
Photosynthesis is the process by which green plants create energy from sunlight. It occurs in the leaves of plants and they produce oxygen and carbohydrates using carbon di oxide, water and chlorophyll of leaves. The oxygen is released into the atmosphere, and the carbohydrates, simple sugars, are used by the plant for growth.
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Abhishek Rai 8 years, 3 months ago
Movements within the Earth’s crust cause stress to build up at points of weakness and rocks to deform.
Stored energy builds up in the same way as energy builds up in the spring of a watch when it is wound.
When the stress finally exceeds the strength of the rock, the rock fractures along a fault, often at a zone of existing weakness within the rock. The stored energy that is suddenly released as an earthquake!
Intense vibrations, or seismic waves, spread out from the initial point of rupture, the focus, like ripples on a pond. These waves are what makes the ground shake and can travel large distances in all directions.
Near the focus, the waves can be very large, making them extremely destructive.
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