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प्रश्न
What are renewable energy resources?
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उत्तर
Renewable energy resources are those that come from natural sources and are naturally replenished. These include solar energy (sunlight), wind energy from windmill (wind), hydroelectricity (rain), tidal energy from waves (tides), and geothermal energy (energy from the heat of the earth).
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संबंधित प्रश्न
Classify the following
Coal, Wind, Tides, Petroleum,Wood, Natural gas
What is the basis of above classification?
Coal is said to be formed from the wood of trees. Why then is coal considered to be a non-renewable source of energy whereas wood is a renewable source of energy?
The calorific values of three fuels A, B and C are 33 kJ/g, 48 kJ/g and 150 kJ/g, respectively. A is solid, B is liquid and C is a gas at room temperature. One combustion, both A and B produce carbon dioxide while C explodes forming steam. B and C leave no residue after combustion while A leaves behind some solid residue. Which one of the three fuels is the most ideal? Give two reasons to support your answer.
Write a short note on the pollution caused by burning fossil fuels.
Why is LPG considered a good fuel?
Why is LPG considered a better fuel than coal?
The main constituent of petroleum gas is:
(a) methane
(b) ethane
(c) butane
(d) propane
What should be the minimum wind speed for the satisfactory working of a wind-powered electric generator?
Which of the following is needed for the formation of biogas from cow-dung and which not?
Water, Oxygen
Apart from cattle dung, what other substances can be added to a biogas plant?
Compare and contrast biomass and hydroelectricity as sources of energy.
Why is biogas considered an ideal fuel for domestic use?
One of the following is not required in the formation of biogas in a biogas plant. This is:
(a) cow-dung
(b) water
(c) oxygen
(d) anaerobic bacteria
What are non-renewable resources of energy? Give two examples of such resources.
Fill in the blank
Solar cells use the power supplied by the ______.
Choose the correct answer.
The coal that has the highest percentage of carbon is
Give an account of the use of solar energy.
Describe the four major types of coal.
Look at the figure where petroleum and natural gas deposits are shown. Why do we find oil layer above water layer?
Why petrol is exhaustible natural resource, whereas sunlight is not? Explain.
