Question

An object weighed 7N in air and 5N in water.If the object is immersed completely in water and the density of water is 1000kg m-3, calculate the ;

(a) weight of water displaced,
(b) Volume of the object
(c) density of the object

Answer 1

(a) 7 N - 5 N =

(b) the object displaced 2 N of water
... w = m g ... 2 = m * 9.8
... the volume (in L) is equal to the mass of water (in kg)

(c) the 7 N object has the same volume as 2 N of water
... its density is 7/2 water's density