The story goes that a boy in Holland saved his country from being flooded by plugging a hole in the sea wall with his finger. Parts of Holland are lower than sea level and walls have been built to keep the sea out. If the hole was 2.00m below sea level and the density of the North Sea is 1030 kg/m3

a) What was the force on his finger (diameter 1.20cm)?

b) How long would it take to flood 1 acre of land to a depth of 1 foot if he pulled his finger out? Assume the hole did not get any bigger which is probably not a very realistic assumption.

c) Find a water bill and work out how much water you use in a year and compare this to the amount of water in a foot-acre.