The arrival of the winter season pleases adults and children, reminding them of the approaching New Year and Christmas holidays. The main winter attribute is, of course, snow, which is eagerly awaited by everyone to enjoy winter fun. Children make snowmen and sledding, adults go in for skiing and snowboarding. However, not all the inhabitants of the planet are lucky enough to be able to enjoy the snow throughout the winter. In some places the first snow falls in November, and in some places it becomes the last at the same time.
Where and how does the huge amount of snow that falls in winter disappear? Snow melts, that is, turns into water and simply evaporates, obeying the laws of physics. But many people have another question: why does dirty snow melt much faster than clean snow? In this regard, people constantly see dirt and water on the roads where cars drive. For the same reason, in cities, snow usually disappears quickly in winter, and it remains in the forest for a long time. Of course, snow is constantly being removed in the city, but this is not the only reason.
Here again the laws of physics come to the rescue, which can explain this mysterious phenomenon for many. As you know, objects of dark colors attract more heat to themselves and absorb it, in contrast to light ones. Now let's switch to snow. White snow, so gloriously sparkling in the sun, is actually practically unaffected by it and does not react to heat. The white color reflects the sun's rays, and the snow remains on the ground, pleasing the eyes of children and adults. Naturally, this only happens if the air temperature is below zero. In this case, the sun only decorates the snow, but does not destroy it.
Now let's imagine dirty snow. Snow cleaning in cities does not happen so often, so residents have to feel the melting process on themselves. And this happens for one simple reason. Snow, which gets dirt from cars or pedestrians, becomes dark in color and begins to absorb the heat that the sun gives it. Under its influence, such snow actively melts, turning into mud, which many do not like so much. As you can see, the whole point is only in the laws of nature and the physical properties with which the snow is endowed. That is why on the roads the mountains of snow quickly turn into slush, and the paths trodden by passers-by are bare, after which the snow disappears.