Do I get a gold star? Paul D No! And if I was in your class, you'd ridicule me in front of the others for my stupid question. er umm wait on, hey I took your answer out of space and put it in the closed system of a U tube. Heat applied at the bottom, does indeed cause the liquid to expand , and in so doing we must assume some of the heat was converted into mechanical work. Consider a U tube the top of which is the upper atmosphere let there be a channel level between the to sides so that any fluid on overflowing from one will flow to the other. Let them be full to the top. Now heat the bottom section of the left hand side. The water will expand due to some heat being converted into mechanical work. (is it?yes basic refrigeration principle actually) This expanding force lifts the height of the fluid on the left side, overflowing it into the right hand side wherein it can fall due to imbalanced sides.. Cute Eh! why couldn't wiki answer the question, and there goes one of my free energy machines still in my diary, which will now have to be erased.. thanks Paul Phil ----- Original Message ----- From: Paul Deema To: Geocentrism@xxxxxxxxxxxxx Sent: Sunday, July 08, 2007 8:39 AM Subject: [geocentrism] Re: Fw: inertia Philip M From philip madsen Sat Jul 7 20:35:53 2007 Joule = watt is also the unit of "power" When is energy converted? Is it converted? When I place a bottle of beer in the freezer, don't I extract the heat energy, and warm up the room? Yet the bottle bursts with enormous force ... end quote. 1 Joule = 1 WattSecond. Don't know the answer to the beer bottle though. Use vodker instead -- it doesn't freeze and the problem(s!) go(es) away! Concerning bouyancy and why does warm air with included water vapour rise and where does the energy come from. How about this -- the energy from the Sun heats the air/water in contact with the ground etc which expands (I'd guess it does work pushing the cooler air aside) and the -- relatively -- unheated air above being heavier just sinks due to gravity, the energy coming from the higher potential due to altitude. A bit like tying a baloon to a fixed source of compressed air at the bottom of a tank of water. Blow it up, stop when it's less than full (depth matters here) then when everything stops moving, release it. The water has more potential energy than the baloon due to both density and height and it just bullies that little old baloon out of the way and occupies the volume vacated. Do I get a gold star? Paul D Send instant messages to your online friends http://au.messenger.yahoo.com ------------------------------------------------------------------------------ No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.476 / Virus Database: 269.10.2/890 - Release Date: 7/07/2007 3:26 PM