Because it is made up of iron and steel!
if a refrigerator magnet cant hold a piece of paper against a refrigerator, the forces acting on the magnet must be what?
a magnet
Magnet
Only while the magnet is entering or leaving the loop. If you hold it still, no current is generated. The same goes for a longer magnet where the loop is being moved, but the magnet always remains inside the loop; no current.
he magnets keep the door shut and help to form an air tight seal between the door and the refrigerator. Also many many years ago refrigerators did not close with magnets and typically closed using a latch. This caused a major problem, there were incidents in which someone would be throwing away a refrigerator and it would be sitting out at the end of there driveway for example. Neighborhood kids would be playing hide and seek and the old refrigerator looked like an appealing place to hide, what kids did not know was that the refrigerator when shut is air tight and that when latched it cant be open from the inside. There were incidents where kids suffocated hiding in old refrigerators. So there was a movement to make refrigerator doors sealable but without the use of a latch, and that is the other reason refrigerators use magnets to hold them shut.
if a refrigerator magnet cant hold a piece of paper against a refrigerator, the forces acting on the magnet must be what?
Because, beneath the paint or finish of the door, it is made of ferrous metal and magnets stick to anything like that, as they contain iron.
a magnet
Magnet
A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. An everyday example is a refrigerator magnet used to hold notes on a refrigerator door. Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic). These include iron, nickel, cobalt, some alloys of rare earth metals, and some naturally occurring minerals such as lodestone.
door or cupboard to keep it closed
There are many refrigerators these days (especially stainless steel ones) which are not magnetic. That might be the source of your problem.
In theory, it could. Larger magnets have a stronger and wider magnetic field. If we are talking about refrigerator magnets, then one would need a lot of them. Additional Answer If the refrigerator is magnetic and the magnet you are using is sufficiently powerful, it WILL hold your science book on the refrigerator. The issue you are having is based on the size of your magnet relative to the size of your science book. There are trains in Germany and Japan called Maglevs which float above the ground using sufficiently powerful magnets.
Hold the light button
Test the door for adhering a magnetic by using a magnet to see if the door is metal or fiber glass
Every electrical spinner contains a magnet, so electric kitchen mixer will also use a magnet.
Firstly check that the contents are not pushing against the door the check the rubber door seal that its not damaged which then causes the vacuum to drop - It is this that hold a door closed. Check also the the fridge is level. If its leaning forward then the door will open on occasion