A vertical cylinder has a cross sectional area of 0.2m2 and contains 2kg of water initially at 15C. The water is subject to a constant pressure of 7 bar by the wieght of the frictionless piston. The system is perfectly insulated and the piston is raised 1m by a heat input rate of 500W.
Calculate the time taken for the piston to rise by this amount.
The average Japanese 10 year old could probably do this in their head in 5 minutes. Meanwhile the wonderful British education system struggles to get 10 year olds to learn their 5 times table.