Apparatus invented by Archimedes is :

A. Pulley

B. Microscope

C. Thermemoter

D. Barometer

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  2. Epoxy resins is used as
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  4. The speed of light with the rise in the temperature of the medium
  5. One fathom is equal to
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  17. The hardest substance available on earth is
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  19. Which of the following items will be attracted to the north pole of a permanent magnet by a magnet force?
  20. The property of a substance to absorb moisture from the air on exposure is called
  21. Brass gets discoloured in air due to the presence of which gas in air
  22. The recent atomic weight scale is based on
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  25. Bromine is
  26. Cell membrane is
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