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Locatelli is not often performed compared to a number of other of his contemporaries but I love his 12 "arte del violino" pieces. I was listening to them this morning and they sounded very complex. The title implies he is trying to push technique. I was wondering how they stand up to the demands of the Bach pieces.

Lavoisier demonstrated that matter in low energy reactions can't be destroyed, so for example burned wood becomes, ash, carbon dioxide, etc., and the weight is the same, even though chemical energy is released. So when someone loses weight I assume that the fat gets metabolized and eliminated as other compounds of some sort. I assume about 70% is water lost through respiration and urination. I'm wondering what the other 30% becomes and how it is eliminated.

I decided for chuckles to calculate the telescope aperture required to resolve an elephant at a distance of 5 light years and came up with a 9 million km mirror. I may have slipped up. Let resolution be defined as Dawes' at .116/m of aperture, and y'all can handle the trig and the size of the elephant any way you want within reason.

This is a tricky calculation with lots of zeroes so I thought I would throw it out for someone to double check.

I'll be there's more than one person out there who can crunch this so "best answer" may be reserved for the answer that includes a reasonable calculation of the thickness and cooling time of the pyrex. You can choose another substrate if you like. Don't forget to show your work! (within reason)

thanks.

I feel a need to study some intro trig and perhaps self-tutor some intro calculus (but trig comes first). I would like some (current) book titles and useful web sites for self instruction.

I am accustomed to using HP calculators with RPN and would like a recommendation for HP models that will suit the bill. Had a "scientific" about fifteen years ago but it is kaput. I don't want one that is so advanced that every function is buried in a menu. My only functioning current HP calculator is the business model.

I have an engineering buddy who will help me out if I get stuck in the study-at-home process.

Thanks for your help.

Looking at my globe, I would have to say that the chain of lakes (Great Bear, Slave, Athabasca, Lynn, Winnipeg, Superior, Michigan, Huron, Erie, Ontario & many others) is, by length and size of bodies, a unique fresh water geologic feature on the planet. The East African chain Victoria-Nyasa is much smaller. The N. American giant fresh water lake chain includes by my count about 22 other lakes some of which, like Champlain and Abitibi, look small relative to the others but may be part of the same geologic formation? Is this the path of one humongous glacial advance/retreat or "random fresh water lakes"? I had thought the glacial advance was North to south not NW to SE. Anyhow if this lake chain has a name and a generally accepted explanation I would like to hear it. I know Athbasaka has its own glacier but "that's just now." Other members of this chain are no longer fed by glaciers. Very interested to see what answers and information the Geology mavens can provide.