Answer: No! Do NOT put aluminum foil in the bottom of an oven, I did that and it ended up melting and baking on the bottom of the oven and it's almost impossible to get it off.
Yep and it makes the baking sheet easier to clean
Yes I have done it in the past.
The acid in the tomatoes reacts to the metal aluminum. Just like you don't put lemon on a fish aluminum foil packet in an oven, the taste becomes metallic. Avoid mixing any acid and aluminum.
Metal spoons - silver or stainless steel or aluminum - would not be damaged by time in a conventional oven, though it is difficult to think of a reason to do so. You must not heat metal spoons in a MICROWAVE oven, as that would damage both the spoon and the oven itself.
Yes you can. You cannot though if it's a microwave oven, and you cannot put on the oven itself, only as a lid for a pan etc.
Unless the handles are all metal, it isn't a good idea. Composite handles can be affected by the heat of the oven. Not sure which set your question relates to, but any all-metal cookware will work in an oven. Others, probably not a good call. If the pots and pans are all metal, fine. If the handles on the lids aren't, don't put 'em in the oven.
No, they are meant to be put in the oven. That's why they call them baking sheets. If they touch the edge of the oven they can become too hot and scorch, however.
A bit of a burn on the wall of the cavity (the cooking space) in a microwave isn't generally a problem. Remove the foil and avoid placing metal objects back inside the oven again. Put a cup of water inside and see if it boils in a couple of minutes. If so, it is still working and you can use it until it dies naturally.
if you have a pacemaker, if you put something metal in it.
Nothing will happen. Displacement reaction only happens when the element is more reactive than the salt solution. An example will be the otherwise. If you put aluminum metal into a solution of Copper (II) Sulfate. The aluminum metal will displace copper metal and you will have a solution of Aluminum Sulfate and copper metal. As long the element you put into the salt solution is more reactive than the cation of the solution, it will displace the metal.
In a gas or electric oven yes, but NOT in a microwave oven
Metal is a heat conductor, when put into a potato it helps bake it more evenly in the oven
You use a dutch oven. Place the food inside the dutch oven, place the dutch oven over the fire. Put the lid on the dutch oven if you are planning to bake anything, place coals on the lid. If you are cooking something soup-like, no coals are needed on the lid.
Yes,Because it will not affect the toaster's heating system.