Question

a piece of stone with its volume 400cm³and density 7.8x10³kg/m³. calculate the weight of the stone in air and the upthrust of water.​

Answer 1

Volume=400cm^3 = 0.0004m3
Density = mass / volume
(7.8*10^3 ) * 0.0004 = mass
Mass = 3.12 kg
Weight = mass * gravitational field strength
W = 3.12* 10
= 312 N