English, asked by shampa1500, 5 days ago

Q4. (1) Explain the statement dust, which is otherwise very harmful, also has an important role'. (ii) Why does a mountaineer carry oxygen cylinders during trekking? (iii) Why cannot the astronauts hear each other in space? [3]

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Answered by tanishka6621

Answer:

Due to low air pressure, mountaineers sometimes suffer from dizziness. It can also lead to hypoxia. (Hypoxia is a condition wherein a region of the body is deprived of a sufficient supply of oxygen at the tissue level. Hence, to avoid such issues arising due to insufficient oxygen, mountaineers carry oxygen cylinders.)

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Q4. (1) Explain the statement dust, which is otherwise very harmful, also has an important role'. (ii) Why does a mountaineer carry oxygen cylinders during trekking? (iii) Why cannot the astronauts hear each other in space? [3]​

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Q4. (1) Explain the statement dust, which is otherwise very harmful, also has an important role'. (ii) Why does a mountaineer carry oxygen cylinders during trekking? (iii) Why cannot the astronauts hear each other in space? [3]