Question

a peice of iron box has a mass of 80g and volume of 25cm^3 find its density and relative density.​

Answer 1

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Answer 2

Answer:

Apparent weight of iron = Weight of iron in air -  weight of iron in water

  As we know , Density =  

volume  mass

​

So mass of iron piece in air =  (volume) (density) =(10 −4  (7800)kg=0.78kg

Weight of iron piece in air=mg=7.8N

weight of iron piece in water = upthrust  = Vρg = 10  −4

(1000)10N=1N

so apparent weight of the iron piece =7.8N−1N=6.8N

Explanation:

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