A solid block is attached to a spring scale. When the block is suspended in air, the scale reads 25N; when it is completely immersed in water, the scale reads 17N. What is the volume of the block? (Take the density of fresh water as 1002 kg/m3) and the acceleration due to gravity as 9.8 m/s2)

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A solid block is attached to a spring scale. When the block is suspended in air, the scale reads 25N; when it is completely immersed in water, the scale reads 17N. What is the volume of the block?  (Take the density of fresh water as 1002 kg/m3) and the acceleration due to gravity as 9.8 m/s2)

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Step 1

The block, attached to the spring scale, expands the spring, and thus by the force acting on the spring due to this expansion the weight of the block can be measured.

When suspended in air, the only force acting on the block is the force of gravity, acting downwards. Due to this force, the weight of the block read in the scale is 25 N

Let Fg=25 NFg=mgm is the mass of the blockmg=25 m=25gm=259.8m=2.551 kg

This is the mass of the block

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