Sound waves In 'air travel faster if

A. frequency is higher

B. wavelength is smaller

C. pitch is smaller

D. air is warmer

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  1. When a body is partly or wholly immersed in a liquid the apparent loss of weight is equal to the weight…
  2. The best estimates of the age of the earth comes from the studies of
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  4. A star contains
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  12. A proton is
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  16. Moon has no atmosphere because
  17. The method used to separate aluminium from a alumina is
  18. When a body Is taken to the poles from the equator, Its weight becomes
  19. The electroplating of a metallic article
  20. The cover of a solar cooker is made of glass because
  21. A hunter on the ground wishes to shoot a bird on a tree at a distance with his rifle. He has to point…
  22. Echoes are produced by
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  24. The speed at which light travels in vacuum is
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  27. Which of the following wires of same dimensions offers least resistance to the ,flow of current?
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