(1) A solid weight 0.04 Newton in air and 0.024 newton when fully immersed in liquid of density 300 kilogram per metre cube.What is the volume of the solid?

(2)The density of a body is 5*10^3 kilogram per metre cube and it weights 1 newton in air and.Calculate the apparent weight of the body when when totally immersed in water.(density is 10^3 kilogram per metre cube)

2 answers

weigh=mg=.04
mass= .04/9.8=4.08grams

in liquid:
weight= mg-bouyancy
= mg-volume*density=mg-V*300g/liter

.024=4.08-v*300g/liter

v= = 4.06 grams*1000cm^3/300g
= 13.52 cm^3 check all that.

2. volume=mass/density=1/(9.8*E3)
volume= 102 cm^3

bouyancy= 102cm^2*1g/cm^3

apparent weight= 1-9.8N/kg*.102kg
= 1-.98 N=.02N check math.
A solid cube of side has a mass of 250g. What is its density in kgm-3?