EdEarl

There are at least three possibilities: 1. insulator 2. insulator and heat-sink 3. insulator and peltier plate (see: http://en.wikipedia.org/wiki/Peltier_plate#Peltier_cooling_plates) The insulator and heat-sink would be best, unless you really really need to cool the hot spot well below ambient air temp. The heat sink could be as simple as a copper or aluminum surface on top of an insulator. For example, use a ceramic square (e.g., ceramic floor tile) on bottom. Place an aluminum pan on the insulator Put your thing inside the aluminum pan. The heat will be transferred into the air by the aluminum pan--most of it. The insulator will keep the surface below cool enough to prevent damage, unless it is extremely sensitive to heat. A peltier plate is cool on one side and hot on the other and uses electricity. Thus, it is a bit expensive.

If someone makes a room temperature superconductor, I will willingly print this statement out and eat my words. And, I won't waffle over the inefficient process of putting energy into and taking energy out of it. It will be at least as remarkable as the nearly-weightless metal, and important to both industry and science.

Anything big enough to see that is said to be 100% efficient is inevitably untrue.

NASA used some really good ceramic insulators on the space shuttle. They were full of air bubbles and very light weight. You might be able to make a ceramic using cement, sand and soda water that will allow you to do your 195 degree thing. There is no way to keep the oval from heating some, but a ceramic insulator is your best chance, IMO. The ceramic needs to have many small cavities, and IDK if it can be done with cement. A filler with smaller particles than sand would probably work better, too.

arc, Just put hot water into a cup and put a coin (copper, nickle, silver, or gold) or a ring (copper, silver, gold) into the water, holding it with your fingers, and see if it gets cold or hot (finger thermometer). Do the same with a bit of aluminum from a can. Lots of kinds of plastic are available around the house, also glass and wood from a tree or bush.

arc, What thing you hold in hot water will become cold?

A good programming language is one that your employer or teacher wants you to use. During my 35 year career as a programmer, I had the opportunity to use many languages. There is no best language, only ones that are better at some things than others. After learning several diverse programming languages, to learn another is not difficult, because all have ifs, loops, computations and data. The greater challenge is to learn how to use libraries of code and reuse program segments being maintained.

If you do not accept that no metal (or anything else) will cool down when heated, perhaps it will help us to understand the following: What have you experienced that makes you think such a metal exists. In other words, if we understand the cause of your misunderstanding, perhaps it will help us teach you.

Sounds like a good idea.