Steel.
A magnet sticks to a refrigerator because the refrigerator door is made of a ferromagnetic material, such as steel. The magnet and the refrigerator door have opposite magnetic poles, causing them to attract and stick together.
Magnets are attracted to refrigerator doors because the doors are typically made of ferromagnetic materials like steel. The magnetic field of the magnet interacts with the atomic structure of the metal, causing the magnet to stick to the refrigerator.
Cotton and Steel mills
Usually steel with some coating over that (e.g. paint, plastic).
Plastic offers a number of important advantages as a construction material. It is relatively inexpensive and weighs very little, as compared to using something like marble, glass, stainless steel, or granite for the walls of your refrigerator. It is waterproof, giving it an advantage over wood or particle board or cotton. Also it is a poor conductor of heat.
Both 1 kg of steel and 1 kg of cotton weigh the same amount and would require the same amount of force to lift. The difference lies in the volume and density of each material, where steel would be smaller and denser than cotton.
If you mean the air around them is 0 degrees, then the steel would be colder.
Jack's observation suggests that the door of his refrigerator is likely made of a nonmagnetic material such as aluminum or stainless steel, which do not attract magnets. Magnetic materials, such as iron or steel, are needed for magnets to stick.
They have the same mass as a gram is a unit of mass.
Yes, magnets can typically be put on a stainless steel refrigerator. However, not all stainless steel is magnetic, so it would depend on the specific alloy used to make the refrigerator. If the stainless steel refrigerator is magnetic, magnets will stick to it.
Generally it's stainless steel. I've never heard of a leather fridge in my life.
cotton