What is (a) the density, (b) the relative density of a cube if it has a side of length 200 mm and a mass of 2000 g? The density of water is 1000 kg/m 3 . What is the weight in new tons of a body of...

What is (a) the density, (b) the relative density of a cube if it has a side of length 200 mm and a mass of 2000 g? The density of water is 1000 kg/m³.

What is the weight in new tons of a body of mass 20 g if the acceleration due to gravity is 9.8 m/s²?