A glass bottle with a volume of 5 × 10-4m3 is placed on the horizontal ground, which contains 0.3KG of water. Put the pebbles into the bottle one by one. When a total of 0.5kg of stones are put into the bottle, the water surface just rises to the bottle mouth

A glass bottle with a volume of 5 × 10-4m3 is placed on the horizontal ground, which contains 0.3KG of water. Put the pebbles into the bottle one by one. When a total of 0.5kg of stones are put into the bottle, the water surface just rises to the bottle mouth

(1) A: the volume of water is 0.3 × 10-3m3. (2) the volume of stone is v stone = V water = 5 × 10-4m3-0.3 × 10-3m3 = 2 × 10-4m3, the density of stone is ρ stone = m stone = 0.5kg 2 × 10-4m3 = 2.5 × 103kg / m3

There is a container with a volume of 5 times 10 minus 4 cubic meters, containing 20 solid metal balls with a mass of 0.025 kg each, and pouring 0.444 kg of water
The density of the metal ball can be calculated just flat with the opening of the container

8.93e+3kg/m^3