8.9 Which of the following symptoms is likely to afflict an astronaut in space (a) swollen feet, (b) swollen face, (c) headache, (d) orientational problem.
Explanation:
(a) Legs hold up the entire mass of a body due to gravitational pull. In space, an astronaut feels weightlessness because of the absence of gravity. Therefore, the swollen feet of an astronaut does not affect astronaut in space.
(b) A swollen face is caused generally because of apparent weightlessness in space. Sense organs such as eyes, ears nose, and mouth constitute a person’s face. This symptom can affect an astronaut in space.
(c) Headaches are caused because of mental strain so, it can affect the working of an astronaut in space.
(d) Space has different orientations. Therefore, the orientational problem can affect an astronaut in space.
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