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Relative density of water=………...

Relative density of water=………

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Two communicating cyliridrical tubes contain mercury. The diameter of one is two times that of the other. A column of water of height 70 cm is poured into the narrow vessel. How much will the mercury level in centimeters sink in this vessel? (Take relative density of water as 1 and that of mercury as 14)

The relative density of material of a body is found by weighing it first in air and then in water. If the weight in air is (5.00pm0.05) N and the weight in water is (4.00±0.05) N, find the relative density along with the maximum permissible percentage error.

Knowledge Check

  • A thin uniform cylindrical shell, closed at both ends is partially filled with water. It is floating vertically in water in half-submerged state. If rho_c is the relative density of the material of the shell, then the correct statement is that the shell is

    A
    more than half-filled if `rho_c` is less than 0.5
    B
    more than half-filled if `rho_c` is less than 1.0
    C
    less than half-filled if `rho_c` is less than 0.5
    D
    less than half-filled if `rho_c` is less than 0.5

  • A thin uniform cylindrical shell, closed at both ends is partially filled with water. It is floating vertically in water in half-submerged state. If rho_(c ) is the relative density of the material of the shell, then the correct statement is that the shell is

    A
    more than half-filled if `rho_(c )` is less than `0.5`
    B
    more than half-filled if `rho_(c )` is less than `1.0`
    C
    less than half-filled if `rho_(c )` is less than `0.5`
    D
    less than half-filled if `rho_(c )` is less than `0.5`

  • A piece of solid weighs 120 g in air, 80 g in water and 60 g in a liquid. The relative density of the solid and that of the liquid are respectively

    A
    3, 2
    B
    2, `(3)/(4)`
    C
    `(3)/(2)`, 2
    D
    3, `(3)/(2)`

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    The relative density of a metal may be found by hanging a block of the metal from a spring balance, hi air the balance reads (5.00 ± 0.05) N while in water it reads (4.00 ± 0.05) N. The relative density would be quoted as:

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