Microwaves are radio wavesIn the case of microwave ovens, the commonly used radio wave frequency is roughly 2,500 megahertz (2.5 gigahertz) Radio waves in this frequency range have an interesting property: Water, fats and sugars absorb themWhen absorbed they're converted directly into atomic motion - heatMicrowaves in this frequency range have another interesting property: Most plastics, glass or ceramics don't absorb themBut what about metal? The walls inside a microwave oven are actually made of metalIt turns out that a fairly thick piece of metal works a lot like a mirrorBut instead of reflecting an image, it reflects microwaves If you were to put food in a heavy metal pan and put it in the microwave, it wouldn't cookThe pan would shield the food from the microwaves, so the food would never heat upOther metals are a no-no in the microwave, tooTiny sharp pieces and thin pieces of metal are a different storyThe electric fields in microwaves cause currents of electricity to flow through metal Substantial pieces of metal, like the walls of a microwave oven, can usually tolerate these currents without any problemsHowever, thin pieces of metal, like aluminum foil, are overwhelmed by these currents and heat up very quickly So quickly in fact, that they can cause a firePlus, if the foil is crinkled so that it forms any sharp edges, the electrical current running through the foil will cause sparksIf these sparks hit something else in the oven, perhaps a piece of wax paper, you'll probably be reaching for the fire extinguisherWhile it's highly unlikely that a small piece of foil is going to cause your microwave oven to totally explode, it could cause a fireSo, it's a good idea to stick to plastic wrap, paper towels and any other non-metal kitchen aids.
Consider two casesVented and unvented crawl spacesIf the crawl space is vented then it's a must to insulate between the joistsVents in the crawl space bring cold air flow in the winterNon-vented crawl spaces may also require floor joist insulationIf the crawl space is not insulated.walls and floor, then you will still get a loss of heat aboveHeat flows from warm areas to cold areasWhat makes the floor and room above cold is the loss of heat into the crawl space, not cold coming through the floor from the crawl space, except in cases where air currents come through the floorThe best way to insulate a non vented crawl space it to attach rigid foam insulation to the walls and cover the floor with plastic, and then putting insulation down on the plastic covered surfaceInsulating between the floor joists, increases the your savings in heating costs but is not strictly necessary for comfort.
I can't quite picture your house with a crawl space and a basement, but any wall/floor that is common with the outside should be insulated.
However, I have neither insulation nor vapor barrier under my floorI have NO moisture problems, and I have never had my incoming water line, which lays on the dirt under the floor; freeze, in one of our short cold snapsInsulating above (as in your other question) makes good sense, as it will slow the escape of heat in the cold times and slow the encroachment of heat in the hot times; but the soil temperature remains pretty constant, so the only times your underfloor insulation is holding heat where you want it is when the outside temperature is between room temperature and soil temperaturemy ultimate plan is to insulate my foundation walls, so i can continue to have the benefit of keeping my water lines from freezing, while decreasing the heat loss on cool evenings (of course, all the insulation in the world doesn't help if you keep windows open all of the time.)
The fact that we are living and breathing and able to do all these thingsThe fact that we are not rocks and some divine coincidence made use who we are instead of some inorganic atomThe fact we can give things worthWe can categoriseIts all beautiful, the sight, the sound, the feel, the emotion, the tasteEven painWe can feel that not many other things canPain may be painful, but we can feel it just as we can feel happyIts amazing really that out of all of this we can do these thingsAlthough it seems to suck sometimes its still wonderfulrandom fact: if you shoot a rabbit, it doesnt know why it feels pain, it doesn't register that there is an explanation, it just knows it feels pain and as a reaction will run away, even if its dyingShoot a human (even if they did not know what a gun was) it would realise its something launched, have some sort or knowledge of what to do and so onI dont think this was relevant but its written nowBut if youre looking for one reason it would definitely be pie.
