Q1- Bio gas is an excellent fuel. Justify the statement by giving two reasons. Mention the main constituents of bio gas along with its percentage.
Q-2 Explain how the tidal energy is harnessed and write one limitation of the use of tidal energy.
Q-3 Define tidal energy.
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Answers
Answer:
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Explanation:
1) Bio gas is an excellent fuel. Justify the statement by giving two reasons. Mention the main constituents of bio gas along with its percentage.
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1 Answer.
Methane 50 – 75%
Carbon dioxide 25 – 50%
Nitrogen 0 – 10%
Hydrogen 0 – 1%
Hydrogen sulphide 0 – 3%
2(The tidal energy can be harnessed by constructing a dam across some narrow openings in the sea. During high tides, the rising water enters the dam and which can be made to fall over the turbines and generate electricity. The electricity generated is not high enough to produce electricity on a large scale.
3)Tidal power or tidal energy is harnessed by converting energy from tides into useful forms of power, mainly electricity using various methods. Although not yet widely used, tidal energy has the potential for future electricity generation. Tides are more predictable than the wind and the sun.
Explanation:
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2- The tidal energy can be harnessed by constructing a dam across some narrow openings in the sea. During high tides, the rising water enters the dam and which can be made to fall over the turbines and generate electricity. The electricity generated is not high enough to produce electricity on a large scale.
1- Bio gas is an excellent fuel. Justify the statement by giving two reasons. Mention the main constituents of bio gas along with its percentage.
...
1 Answer.
Methane 50 – 75%
Carbon dioxide 25 – 50%
Nitrogen 0 – 10%
Hydrogen 0 – 1%
Hydrogen sulphide 0 – 3%