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प्रश्न
How do astronauts breathe when they go beyond the earth’s atmosphere?
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उत्तर
It is because nitrogen tires hold pressure longer as compared to compressed air. Nitrogen gas in the tire escapes more slowly than compressed air does.
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संबंधित प्रश्न
What is air pollution ? What are the harmful effects of sulphur dioxide, nitrogen dioxide and hydrogen sulphide present in the air ?
Briefly state the importance of Oxygen.
Briefly state the importance of Carbon dioxide.
Name the components of air with their approximate percentage by volume in air. Does the percentage by volume of each component remain the same, in the atmosphere of different parts of the world? Explain with reasons.
What happens if the percentage of carbon-dioxide increases in the air?
Analogy
Photosynthesis : _____ :: Respiration : Oxygen
“Air is not an elementary substance, but a composition”. Why?
Nitrogen is about two times more soluble in water than oxygen.
Observe the picture given in Fig. carefully and answer the following questions.
Can you comment on the air quality of the place shown in Fig?
Explain the following observations very briefly
Breathing through mouth may harm you.
