Piggybacking on water
How much electricity could be generated if you attached a turbine to the pressurised water supply coming into your home? Would this affect the water supplier or your neighbours?
Physics kudos to all our entrants. Water flow rates varied greatly, but everyone reached the same conclusion about this idea. Thanks to Steve Orchard in Gloucestershire, who points out that in the UK leaving on the tap to generate power would contravene parts of the Water Supply (Water Fittings) Regulations 1999 that are designed to avoid the waste of water – Ed
(Image: Frank Muckenheim/Plainpicture)