Water is a compound because
1 It exists as a solid, a liquid or a gas
2 It contains hydrogen and oxygen
3 It contains two different elements joined by chemical bonds
4 It cannot be split up into simpler substances by chemical
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The system shown in the figure is in equilibrium. The metal
spheres are identical and each has a mass of 2 kg. The
surface areas of the pistons are equal and 100 square
centimeters each. The density of water is 1 g per cubic
Assuming that the frictions and masses of the pistons are
negligible, what is the mass of G?
( g = 10N/kg )
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