Did you notice that the ice cubes that were just taken out of the fridge stick to your hands, and that's because
A. The water on your hands freezes when it is cold
B. The illusion caused by the cold
Correct Answer: The water on your hands freezes when it is cold
Answer Analysis:
When we hold ice cubes that have just been taken out of the refrigerator with our hands, the surface temperature of the ice cubes is very low, usually below 0 degrees Celsius. And our hand temperature is higher, generally around 30 degrees Celsius. There is sweat or moisture on the hands, and when this moisture comes into contact with the ice, it will quickly transfer heat to the ice, and the temperature of the ice itself will drop sharply, causing the moisture to freeze quickly.
During the freezing process, the water molecules rearrange and expand slightly, clinging tightly to the surface of the ice cube and sticking to our hands at the same time, causing the hand and the ice cube to stick together. Sometimes the ice cubes have an uneven surface, and after freezing, they "bite" together more firmly and the stickiness will be greater.
In addition to the freezing of water when it is cold, the solidification of the grease on the hands at low temperatures will also increase the adhesion effect. If the ice cube is left for a long time, a thin film of water will melt on the surface, which will also increase the adhesion.
Although this phenomenon is common in life, it reflects some special properties of water, such as good thermal conductivity and changing density with temperature. At the same time, it also shows that there are a large number of interesting scientific phenomena in life, waiting for us to observe and think. Keep this curiosity and inquiry, and you'll be able to discover more about the things around you!