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Counterintuitive stream.
Jun. 26th, 2005 06:16 pmThis is a note of something I know I've mentioned before, clearly labelled so I don't forget it.
From the New Scientist, some years ago:
On the Greek island of Cephalonia there is a stream of seawater which runs from the beach, along a watercourse and down a hole in the ground about 100 metres further inland. Until the disastrous 1953 earthquake there was enough power from this stream to drive a water mill. How can this be? It is said that the water, after pouring into the hole, emerges in a cave which must be below sea level, but where does the energy come from? How is it possible to have a place below sea level, very close to the sea, where the hydrostatic pressure is less than that of the sea?
DOUG FENNA , Middlesborough Cumbria
From the New Scientist, some years ago:
Perpetual motion
Question
On the Greek island of Cephalonia there is a stream of seawater which runs from the beach, along a watercourse and down a hole in the ground about 100 metres further inland. Until the disastrous 1953 earthquake there was enough power from this stream to drive a water mill. How can this be? It is said that the water, after pouring into the hole, emerges in a cave which must be below sea level, but where does the energy come from? How is it possible to have a place below sea level, very close to the sea, where the hydrostatic pressure is less than that of the sea?
DOUG FENNA , Middlesborough Cumbria
