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प्रश्न
How is air useful to windmills?
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उत्तर
Windmills work where there is sufficient movement of air.
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संबंधित प्रश्न
Give two uses of the following component present in air:
nitrogen
Tick (√) the correct alternative from the choice given for the following statement.
Air consists of
Tick (√) the correct alternative from the choice given for the following statement.
The gases which cause acid rain are
Water does not have a ______ but has definite ______ and ______.
How is light scattered by the air?
Fill in the blank:
The gas evolved as a product of combustion as well as respiration is ______.
Complete the statement given below by filling in the blank with the correct word/s from the word/s given below
____________ is an example of a pollutant present in the air.
Cool and soothing wind: Breeze.
uproot trees wind: ______.
About 78% of the volume of air is ______.
Match the items of Column I with the items of Column II
| Column I | Column II | ||
| (a) | Weather cock | (i) | Gases and fine dust particles |
| (b) | Mountaineers | (ii) | Sailing yacht |
| (c) | Fine hair inside the nose | (iii) | Oxygen cylinders |
| (d) | Smoke | (iv) | Direction of air flow |
| (e) | Wind | (v) | Prevent dust particles |
