Q45 of 100 Page 209

Why do mountaineers usually suffer from nose-bleeding at high altitudes ?

At higher altitude the atmospheric pressure decreases therefore the blood vessels exceed the outside pressure which causes blood vessels to get rupture.


More from this chapter

All 100 →
43

Give two examples from everyday life which show that air exerts pressure.

 44

What is a rubber sucker? How does it work? State any one use of a rubber sucker.

 46

Describe one activity to show the existence of atmospheric pressure.

 47

Explain why, water comes out more slowly from an upstairs tap than from a similar tap downstairs.