In life, from time to time there is a need for some time to keep the subject cold. In fact, from the point of view of physics, the phrase "keep cold" is not entirely correct. Cold is just the absence of heat, like, say, darkness is the absence of light. Thus, our task is to prevent the subject from heating up. There are several ways to do this.
Instruction manual
1
The easiest and most affordable way at home is to put the item in the refrigerator. There it is guaranteed not to heat up.
2
If there is no refrigerator at hand, you can put the item in a bathtub filled with cold water from the tap or put it in front of the air conditioner set to the minimum value.
3
If there is no air conditioning or bath, a regular fan will help. Wrap the object with wet cloth and direct a stream of air at it. During evaporation, water cools the surface on which it is located. So you can chill, say, bottled drinks. The main thing is to ensure that the fabric does not dry, otherwise the heating process will begin again.
4
A small, small object can be placed in a thermos. There he will keep his temperature for several hours.
5
In nature, you can use special hypothermic packages. They are in any car kit. Each package is usually printed with instructions that explain how to use it.
6
If at hand there is nothing cooling at all, a cold object can be wrapped at least tightly with any heat insulator: a fur coat, cotton blanket, warm jacket. They will create some semblance of a microclimate, limiting the access of warm air. It will not be possible to keep the subject cold for a long time, but a couple of hours can be won against the heat.
