A student does an experiment with a plastic bottle. He tips the bottle through different angles and measures the angle at which it topples over Then he adds water to the bottle and measures the angle again . a Here are the results of his experiment . Plot the results on the graph paper . 60 70 60 Angle f^ ) 60 50 50 .40 Volume water (cm^ 3 ) 250 500 750 1000 1250 1500 1750 2000 30 30 20 10 20 15 10 10 0 5001000 1500 volume of water (m ^ 3) 2000 2500 Write a conclusion for this experiment . Include these words in your conclusion : stable centre of mass