When I got home this morning, as I was parking the car, the BeeGees were blasting through the speakers and everybody was Stayin' Alive. Well, the blasting was relatively mild because I didn't want to wake the neighbors at 6h30, but the fact remains that I was in a very good mood.
I've just slept for 3 hours, and my mood is definitely less good now, though that probably won't last. I'll be feeling better in no time. How would you feel after a long nightshift and only a couple of hours of sleep? Right, with that settled, let's move on to the next issue, shall we?
When I opened my mailbox a couple of minutes ago, I was pleasantly suprised : it was filled with stuff! I normally don't get that much mail, so today's number of things inside really was refreshing. Some things that have been on my internal "when the hell is it gonna show up"-list for a gazillion days were present, and the ratio of "interesting vs. bills" was quite acceptable too, so I can officially declare this Good Mail Day. There you go, happy everyone?
Now, does anyone know the expansion rate of water when going from liquid to solid/frozen? Last night at work we were having a little discussion and during the course of the talks, we needed to know how much water would expand. Needless to say, none of us had a clue, so we called someone at 3h30 that should know. The benefits of working in a 24/7 industrial environment, I suppose. Well, he couldn't tell us right away, but could look it up. We declined the offer and focussed on the more practical issues of our energy producing idea we had. However, today I recall we still don't know the expansion ratio of water, so I just looked it up :
It is usual for liquids to contract on freezing and expand on melting. This is because the molecules are in fixed positions within the solid but require more space to move around within the liquid.
When water freezes at 0°C, at atmospheric pressure, its volume increases by about 9%. If the melting point is lowered by increased pressure, the increase in volume on freezing is even greater (e.g. 13% at -20°C).(source : Explanation of the Anomalies of Water)
Now you know, though I must admit I have not checked the above statement. 9% is quite a lot more than we expected as we were "working" with a 3% expansion ratio. D., if you happen to read this, this really improves the efficiency of our idea :)