wasser_1@viking.DEC (John A. Wasser) (05/03/85)
>In some places of the world, the Bay of Biafra is one, sunlight causes >heating and evaporation which results in first tens of feet of >water being more saline and warmer than the water several hundred feet down. > >Take a 200 foot long pipe and suspend it vertically with its top end >about ten feet below the surface. Now start and upward flow in the pipe. >As the less saline water warms by thermal conduction through the wall >of the pipe it becomes less dense than the more saline water on the >outside of the pipe. This density difference then maintains the flow >once started. > >Is this a perpetual motion machine? No. If you check the first paragraph is attributes the conditions to SUNLIGHT. When the sun stops shining, no more water flow. (I don't mean "at night", I mean "when the sun stops shining"... you did say PERPETUAL didn't you?) -John A. Wasser Work address: ARPAnet: WASSER%VIKING.DEC@decwrl.ARPA Usenet: {allegra,Shasta,decvax}!decwrl!dec-rhea!dec-viking!wasser Easynet: VIKING::WASSER Telephone: (617)486-2505 USPS: Digital Equipment Corp. Mail stop: LJO2/E4 30 Porter Rd Littleton, MA 01460