This is because the water vapour in the air condenses on the cold surface of the apple.
When an apple is taken out from the refrigerator and placed outside, it undergoes a process called condensation. The cold apple coming into contact with the warmer air causes moisture in the air to condense on its surface, resulting in water droplets forming on the apple.
Water is evaporated faster outside a refrigerator.
Nothing ,if the refrigerator is working properly. If you put water in the freezer it will become ice.
It's condensation
To clean the outside of a refrigerator effectively, start by unplugging it and removing any items on top. Use a mixture of warm water and mild detergent to wipe down the surface. For tough stains, use a paste of baking soda and water. Dry the surface with a clean cloth and plug the refrigerator back in.
If an object is cold enough, it will cause the water in the air around it to condense from gaseous form to liquid form, on the surface of the object. This is because there is only a certain amount of water that air can hold at a specific temperature. Hot air can hold more water than cold air, so if hot (or warm) air is cooled, then it will not be able to hold all the water it contains. This is what happens with the apple. The apple cools the air near it, and some of the water comes out of the air.
more of a straight science question than a culinary science one.
When water freezes in the freezer section of a refrigerator, the heat is typically removed by the refrigeration system which then releases it into the surrounding room. The heat is transferred outside of the refrigerator, contributing to warming the room slightly.
but you just put the water in the refrigerator
the cells in the celery lose water through evaporation, causing the celery to become dehydrated and limp. Celery has a high water content, so when it is exposed to air in the refrigerator, it can lose moisture quickly, leading to wilting.
The standard size for a refrigerator water line used to connect the water supply to the refrigerator is typically 1/4 inch in diameter.
The stain under the water spout on the outside of your refrigerator door is probably "boiler scale." That is the minerals that are left when water evaporates. Commercial products exist to get rid of bathtub scum. They might work. Vinegar also might work. You do not want to use anything that will scratch the finish.