Hello, everyone, the lobby of a star-rated hotel is very cold in winter, but the top floor temperature is very high and hot. Why?

This is related to physics, because the density of hot air is small and the temperature of cold air is small, so the same volume of cold air is heavier than hot air. So you can explain your problem. In the hotel, due to the influence of people and heating appliances, the temperature rises from the first floor. As can be seen from the above, under the action of cold air outside the hotel, the indoor temperature rises, so the temperature on the roof is higher than that on the downstairs. )