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[" A small coin is resting on the "],[" ...

[" A small coin is resting on the "],[" bottom of the beaker filled "],[" with a liquid.Aray of light "A],[" from the coin travels upto the "4cm],[" surface of the liquid and "],[" moves along the surface "],[" (figure).How fast is light "],[" travelling in the liquid? "],[[" (a) "2.4times10^(8)m/s," (b) "1.8times10^(8)m/s],[" (c) "3.0times10^(8)m/s," (d) "5.0times10^(5)m/s]]

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A beaker is filled with a liquid of density rho upto a height h If the beaker is at rest, the mean pressure at the walls is:

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