National Science Olympiad Level 2 Solved Papers 5 Years Instant Class 2023
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Questions and Answers

In the given displacement-time graph, which note is louder and which note has a higher pitch?

  • II - Higher pitch, I - Louder
  • I - Louder, II - Higher pitch
  • I - Higher pitch, II - Louder
  • II - Louder, I - Higher pitch (correct)

    • What problem do mountaineers often encounter when they reach high altitudes?

  • Nose bleeding (correct)
  • Dizziness
  • Frostbite
  • Shortness of breath

    • Why do mountaineers often encounter nose bleeding when they reach high altitudes?

  • The increased oxygen concentration at high altitudes directly affects the blood vessels in the nose.
  • The blood pressure of their body becomes much less than the atmospheric pressure, making the blood vessels burst. (correct)
  • The low temperature at high altitudes causes the blood vessels in the nose to contract and burst.
  • The blood pressure of their body becomes much higher than the atmospheric pressure, causing the blood vessels to burst.

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