Now many people pay more attention to health, so everyone likes to make tea at home. But you may find such an interesting phenomenon when making tea. After the teapot outlet is blocked, the tea can't be poured out. After blocking the lid of the teapot, the tea won't pour out. Why?

First, why is this happening? In fact, it is very simple physical common sense. Bian Xiao is also here to give you a detailed introduction. If you have the habit of drinking tea at ordinary times, you may find a small hole in the lid of the teapot. This small hole has a great effect. This small hole is actually used for ventilation. Without this small hole, no one can pour tea. In order to keep the pressure inside and outside the teapot consistent, everyone must reach a certain amount of water when pouring tea, so a certain vacuum will be formed in the teapot.

Second, the specific analysis of Bian Xiao here also gave you a detailed analysis of the reasons. If you want to pour tea smoothly, then you can only ensure that the air pressure inside and outside the teapot is the same. If there is no such hole, it may lead to air pressure inside the teapot and air pressure outside the teapot. Inconsistent. If this hole is blocked, the air pressure outside the teapot will be greater than that inside the teapot. At this time, the water in the teapot will be pressed inward, resulting in the phenomenon that the water cannot be poured out.

Therefore, a hole must be added to the tea cover of the teapot so that the teapot can be connected. This is the airtightness in physics. After the small hole is blocked, the internal and external pressures may be wrong, because everyone pours water by gravity. But at this time, the pressure of air on the teapot is greater than gravity, so the tea in the teapot will not pour out. You can clean the filter screen at ordinary times to ensure that the teapot cover will not be blocked.