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Hi. A silverware cleaning method calls for a hot solution of sodium carbonate plus a 'pinch' of common table salt; or sodium bicarbonate, or sodium hexametaphosphate, and even plain table salt alone, all in an aluminium vessel. The reaction is supposed to be " 2Al(s) + 3Ag2S(s) + 6H2O -> 6Ag(s) + 2Al2(OH)3(s) + 3H2S(aq) " But with so many choices as above, I have to think it is more a product of guessy empirism than a fine tuned fact. Any solid suggestions and optimization please ?

Enjoy, -----> http://www.wimp.com/tiniestengine/

Are you talking about reflectors or parabolic concentrators ? No, I did not see the video. What is the intended purpose, what is the wavelenght of preference, what do you expect from them ?

Let's have a moment of silence for all those who are stuck in traffic on their way to the gym to ride the stationary bicycle Added text : and whenever they get there will be driving around and around the parking lot again and again until the parking spot by the front door is available. ----> http://www.more-funny.com/2011/11/lets-have-moment-of-silence-for-all.html

Hi. JohnF : Read the transcriptions corresponding to "Page 2 of 9" and "Page 9 of 9" shown by the middle and at the bottom end of this link : http://www.bibliotecapleyades.net/sociopolitica/esp_sociopol_mj12_16.htm

A steam engine worth sharing. Enjoy. ---> http://amazings.es/2011/11/04/una-maquina-de-vapor-hecha-de-cristal/

Sound energy decays into heat. That 2Kw speaker in vacuum... nothing escaped nor reached the surroundings because never emitted sound without air. It just vibrated and the mechanical friction became heat.

Hang the copper thieves by the gonads and post the pictures everywhere, including places that buy metal. That has to stop it. Because the police does not work, and if they do; the judicial system lets them free with a slap on the hand. Suffered twice copper theft; they make $40 worth of metal and cause thousand$ of damage plus costly downtime. If caught; they can not pay for the repairs because 'they are poor' and do not work.

There is many types of seeds that spin, glide or 'float' on air for transportation away from the parent tree.

It can also be poor design. A properly made unit would mute audio during switching on and ramp up the level after.

That was brilliant, ewmon. Thanks to all.

Nope on electronics adjustments -----> www.fairchildsemi.com/ds/QS/QSE158.pdf If no lensing is promising... Parabolic mirror could work. Thanks

What are the important differences in use interchangeability among coal, carbon, charcoal, graphite ? As to be used in a battery cell electrode; would a rod made of reasonably pure (~85%) 'natural' coal behave like a carbon rod ? Question 2 : Seen chinese machinery manufacturers advertising extruders to make rods and hollow rods from coal/charcoal. What is the main use for such product ? Is it used in USA ? ----> www.alibaba.com/showroom/coal-rods-extruder.html

Hi. How can the exterior (as in a yard) ambient light just after sunset be focused/directed to a photosensor in order to delay its action that turns on some lights at night ? The sensing device is not adjustable for threshold of operation. I have several plano-convex and bi-convex lenses; from 1" to 6" diameter. With a defined light source as the sun disc, focusing it to the photosensor is no problem -when coaxial- but with diffuse light it is another story. Suggestions, please ?

I hate cable/satellite/direct TV traffickers that charge a monthly good chunk of money for you see programming drowning in advertisements. And nobody moves a finger to fight it. It is easier just to pay ? These cable+ service providers make the customers pay twice with the practice. Once for the advertisements and then again to watch them.

Go to -----> scirus.com

If I understand your question properly, the 11 holes could be punched in one downstroke by the same 4.7 ton press if the punch dies are sequentially staggered in depth. I do not know what the 3.7 m have to do here. It would take each punch die to be ~4 mm longer than the other; when punch 1 exits trough the material, the next one starts punching. If that is not what you were after, sorry, will count only as "an idea on how to work it out." - - - - - - - - - - - <---- 11 punch dies assembly going down - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ============ <---- 6061 sheet The leftmost and longest punch die will go trough first, then the next and next while the whole die assembly comes down...

Beyond hate; the concept of CAR/vehicle insurance. Insurance is a good thing to have, but not the way politicians have managed to push it. And nobody reacts; blindly paying for it instead of fighting it. It should be DRIVER's insurance. If you happen to have two cars, and something else, as a boat, motorcycle, RV... No matter which of those five vehicles you drive; four of them pose zero point zero risk. And the insurance companies still fatten their pockets with them every minute. Why are we forced to pay insurance for a vehicle in a garage There is no remote way in this planet you can drive even two or more vehicles at the same time. DRIVER's insurance; to cover YOU/thirds driving ANY vehicle. Be your car, the rental one, auntie Emma's van or the neighbor's lent truck.

Hi. Sorry for responding late, my compfuser died on a power surge and been fixing it a few days. Do all internal heating flow with open end pipe to exhaust the warm gases, no tissue please. What is the tissue meant for ? If your hair dryer sputters at high speed, it may be something wrong with it, or flow is not flowing. - hair dryer hot air into pipe ----->===============-------> warm air venting - after a while the entire pipe will get hot enough to bend it. Give it enough time, give it enough heat... It will work.

Not dryer insulation. Clothes dryer vent duct. At any hardware store. Did you try the hair dryer into a small PVC pipe first ?

Hi. Am pleased you are not into Nintendos but excercising your knowledge and skills instead. A blow torch will not work from the outside of the pipe. It will create a melting spot area with deformation and possible burning spots. PVC does not transmit heat easily and the rest of the pipe will stay rigid. A heat gun would be too wimpy for the task. The blow torch hot gases -no flame- directed inside the pipe can work. That is why I suggest a length of dryer duct as buffer. Another way could be a kerosene 'garage heater' at a low heat setting but after a good length of pipe so high temperature flames will not be near at all. It is about amount of heat fed, not so much about temperature. The difference between temperature and amount of heat : A match burns at say 1000 degrees F. A house on fire burns at say 1000 degrees F. Same temperature. But they put a huge difference in the amount of heat produced. Do some testing with smaller PVC leftovers, say a hair dryer into a 1 inch pipe, evaluate the results and come back. -Get some assistance from a nearby old fart with lots of experiences-

Thanks. Gauge pressures. Yes, seawater at atmospheric pressure. The point is replacing presurizing the seawater compartment with suctioning the desalinated compartment; or, replacing a compressor at the inlet with a vacuum pump at the outlet to achieve same amount of differential pressure in the process.

Hi. On a reverse osmosis process, If the seawater compartment on a desalination process is at 1000 psi; and the desalinated water compartment is at atmospheric pressure; Seawater @1000 psi -----> membrane -----> desalinated water @0psi What would be the equivalent pressure differential using atmospheric seawater compartment and partial vacuum to achieve same results ? Seawater @0psi -----> membrane -----> desalinated water @??? inches of Hg How is it calculated ? Thanks

I would restart from the beginning again, bend a complete pipe and later rework/cut its shape to needs. Now; how to bend ? ----> Fit the PVC pipe to a metal hose, like those for a clothes dryer vent; connect it to an automobile exhaust. Shortly the PVC pipe will be like a noodle to form at will. You will need oven gloves and have the forming jig ready right there. It will not be brittle when cooled.

Know peanuts about the subject; but the image shows most if not all the blue dots with a red duplicate at their right side. That seems to point to a flawed image.