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The Cact that the compass needle does not point true north was observed first by

A. Sir Isaac Newton

B. Columbus

C. Archimedes

D. Thomas Alva Edison

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  1. When a ship floats on water, the weight or water displaced is
  2. The tiniest of the stars belong to the group known as
  3. The plants in a greenhouse are enclosed in a glass enclosure because
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  5. Isotones are species of atoms containing
  6. In a refrigerator cooling is produced by
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  8. In the nucleus of an atom, the uncharged particle is
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  19. A hunter on the ground wishes to shoot a bird on a tree at a distance with his rifle. He has to point…
  20. Atoms which have the same atomic number but different mass numbers are called
  21. A bullet is fired at a certain angle with the horizontal. Its path will be
  22. The cell that can be recharged, after it has run down, by passing a direct current through it from a…
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  27. The mode of travel of heat energy from the sun across the empty space beyond the earth's atmosphere…
  28. A person cups his hand around the mouth when shouting. Why?
  29. The velocity of sound in a medium is
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