Hey experts!! Answer these questions fast!! (#paglu st pe aa)

Dear Student,

The solutions to your 4^th and 5^th queries are given below:
4.)The different types of coal are:
 

• Anthracite: Often referred to as hard coal, anthracite is hard, black and lustrous. Anthracite is low in sulphur and high in carbon. It is the highest rank of coal
• Bituminous:Bituminous coal is a soft, dense, black coal. Bituminous coal often has bands of bright and dull material in it
• Lignite: Lignite is brownish black, has a high moisture content (up to 45 %), and a high sulphur content
•  Peat:Decaying plants in swamps produce peat, which has low carbon content and high moisture content.

5.Geothermal energy

Geothermal energy is the heat energy in the Earth’s interiors. The temperature at the centre of the Earth is about 6000°C. In some areas, molten rock (magma) is found very close to the surface of the Earth. This hot rock meets underground water and heats it up. This produces steam. Such a place is known as a hot spot. Sometimes, this heated underground water finds an outlet through which it comes out on the surface of the Earth. Such outlets are known as hot springs.

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Regards.