Question

An object weighs 20 N when completely immersed in water and 30 N when completely immersed in a liquid of density 0.75 g/cm3 i) mass of the object is ................. kg ii) volume of the object is ............. cm3 iii) weight of the object when completely immersed in a liquid of density 800 kg/m3 will be ........N

Answer 1

Answer

Once you know the volume of the displaced water, you can immediately determine its weight by multiplying by the density of water at the relevant temperature. That's because the definition of density (d) is mass (m) divided by volume (v), so m = dv.