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14. Sticky balloon

When a balloon is rubbed on your hair it can often be made to stick to the ceiling. How long can such a balloon hang suspended? How does this time depend on its size, weight and the ambient conditions?

	Report	Opposition	Review
Australia		4.80
France - ENS Ulm			7.40
Russia		6.25
Spain	4.00
Switzerland			5.25
UK	7.00

MEAN

5.50

5.53

6.33