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The reading of a spring balance when a b...

The reading of a spring balance when a block is suspended from it in air is 60 N. This reading is changed to 40 N when the block is submerged in water. The relative density of the block is:

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The reading of a spring balance when a block is suspended from it iin air is 60 N the reading is changed to 40 N when the block is submerged in water. Find the relative density of the block.

A block hangs from a spring balance. The balance reads 40 N in air, 35 N when block is immersed in water and 25 N when block is immersed in another liquid. Find the density of block and other liquid.

Knowledge Check

  • The reading of a spring balance when a mass is weighed on it in air is 40 gm. When the mass is immersed in water, its reading is 20 gm. The specific gravity of the mass is

    A
    3
    B
    2
    C
    1.5
    D
    2.5

  • A block weighs 15 N in air and 12 N.when immersed in water. The specific gravity of the block is

    A
    `0.8`
    B
    `0.25`
    C
    `5//4`
    D
    5

  • A spring balance shows 100 gf reading when a metallic sphere is suspended from its hook. When the completely immersed in water, the reading shown by the balance is 75gf. The relative density of the material of the sphere is

    A
    1
    B
    2
    C
    3
    D
    4

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    A spring balance measures mass of a block as 50kg when the block is submerged in water its reading is 45kg while when block is submerged in unknown liquid reading is 42kg .The specific gravity of liquid is

    A bucket of water is suspended from a spring balance. What happens to reading of balance (a) when a piece of stone suspended from a string is immersed in the water without touching the bucket (b) when a piece of lead or cork is put in the water in the bucket.

    A spring balance reads 10kg when a bucket of water is suspened from it . What will be the reading of the balance when an iron piece of mass 7.2 kg suspended by a string is immersed with half its volume inside the water in the bucket? Relative density of iron is 7.2

    A spring balance reads W_(1) when a ball is suspended from it. A weighing machine reads W_(2) when a tank of liquid is kept on it. When the ball is immersed in the liquid, the spring balance reads W_(3) and the weighing machine reads W_(4) . Then, which of the following are not correct?

    A wooden block of volume 1000cm^(3) is suspended from a spring balance its weight is 12 N in air. It is suspended in water such that half of the block is below the surface of water. The reading of spring balance is

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