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FAQ

Regarding conducting cold-Lets say you want an object to be cold that is sitting on top of a thin sheet of glass which is layered on top of a sheet of aluminum and there is something very cold under the aluminum, will the object become cold? In other words, can the coldness conduct great even with the glass on top of the aluminum? Any help thanks!

Answer is it depends More strictly speaking, heat flows in all directions and by only 3 methods: convection, conduction, and radiation There are several ways to pump heat and a refrigerator/air conditioner uses technology which alternately expands and compresses a working fluid (freon in the old days before we worried about global warming)Scientists have also developed solid state thermoelectric materials but these are still very expensive compared to refrigerator typeSo it is better to consider cold as the absence of heatThe thermal conductivity of the material is only one part of the situationYou need to consider radiation and convection as wellIn metals, thermal conductivity generally goes with electrical conductivity so Al if a pretty good conductorIt depends a little on exactly what type of glass you are talking about but glass does not conduct as well as Al There are scientists who speciallize in understanding heat transfer and invest a lot of time and energy to learn about this very complex areaIf you really want to understand how heat flows in a particular system, there are thermal modelling software packages that allow you to calculate such thingsThese programs are rather expensive because you are dealing with a phenomenon that is rather complex and there are lots of factors to considerTypically, it takes a scientist some time to learn the software and understand how to use such programs to get realistic modelsIn your particular case, you need to be more specific and answer these questions: what is the object made of, how big is it, how much surface area is in contact with the glass, what is the starting temperature, how thin is thin, how big is the Al sheet, how thick, what is the area of contact between the Al and the glass, how is the Al cooled, what else is around the object (is it air, water, liquid N2, molten rock, a vacuum, other), and lots of other questions hope this helps

What seasonings would I use? cumin?Does this sound good to you?

A quick look at the periodic table will tell you how many electrons an atom will gain or lose to have the same electron configuration as an inert gasMetals only lose electrons to form ions and nonmetals only gain electrons to form ionsCa loses 2 F gains 1 Al loses 3 O gains 2

All my cookies and bars burn on the bottom, even when the top isn't quite ready(There was a temperature problem with the oven so the manager replaced it with a new one)My bars burn on the bottom and the side, even when I used a glass pan.My cookies burn on the bottom even when I use foilThe last batch was non greased also.Maybe parchment paper?

Back in the early 1900s, Coca-cola did have a small amount of cocaine in itThis was used more as a cough syrup than a drink(It was what put the Coca in Coca-cola.) They don't do this anymore howeverThe use of Cocaine is illegal.

I have ran into a road block doing some of my lab equationsThe lab was to determine the Atomic mass of AluminumI need to calculate the number of moles of HCl used, by using Ideal Gas Law,pV nRTHowever, I need to find the pressure of the HCl first, so I subtract the water pressure from the atmospheric pressureWater temp was 25K which gives me 3.1690 P/kPa, and the Atmospheric Pressure was 751mm Hg which converts to 100.125kPaP(H2) P(atm) - P(H20) This is where I ran into my problem of subtracting 100.125kPa from 3.1690P/kPa, they are different unitsPlease helpThanks to those who reply.

100.125kPa 100,125 Pa It's this: 100,125 Pa minus 3.1690 Pa 100121.831 Pa This is not phrased correctly: my problem of subtracting 100.125kPa from 3.1690P/kPa Round off the 100121.831 Pa as you see fit.

Hi,Just wonderingI love Saturns, always have for the past 10 yearsThis isn't about why I shouldn't get a Saturn either :)I was wondering, is the Enhanced Performance Package worth the extra $995? Defined as:Enhanced Performance PackageIncludes ECOTEC, 2.4L 4-cylinder MFI aluminum engine with 175 hp 6200 rpm and 164 lbs-ft of torque 4800 rpm, 3.91 axle ratio (Auto only), Ride and Handling suspension, 4-wheel antilock brakes with traction controlINCLUDES JM4.Is this going to save me money in fuel? or spend more? I know the brakes and traction are a big plus though.just don't understand the engine specs bonuses.Thanks

1It will not save gas - there are no miracles, and a more powerful engine will burn more gas2ABS and traction control are valuable options, and I wouldn't hesitate for a second unless you live in the place with no winterIn that case I probably would passAlso, make sure you check that at least some of these options don't come with a basic model - it's hard to imagine that at least ABS is not standardThese days, even decent $13K cars like a small Scion come with itDon't trust a dealer - check the facts for yourself!

Ok, so you know how frozen foods usually have, after taking it out of the box, a plastic bag over it? And also the plastic bag has 2 opposite sides with an extra flap of plastic so you can open it easier? Well, I've bought these same taquiotos before and they were in such packaging, but today, I opened up a box and it was missing the 2 flapsSo um is it safe to eat these taquitos?

the cream of mushroom soup/gravy will separate on defrosting I cook the pork chops then freeze them separately half done! I don't like putting creamed dishes in freezer.

How to replace caulking around windows using a bag with caulking in it to fill large gaps ( 1 ) and make it look professional looking ? Not sure if the caulking is a mix or just the tubes emptied into the bag? Anyone tried this before? Please help me and thanks for your information.

yup.once with a waitressShe was so gorgeousWe made eye contact and i said hiWe had a chat and i hinted her to the store roomShe really wanted it and so do i.

i need to know how to turn aluminum sheets rusty?

Sure, but you might want to adjust the oven tempa littleThe metal pan will conduct heat faster than the glass pan, so if you leave the tempthe same the sides and bottom may burn.