As we all know, "eating and vomiting" is a physical phenomenon ... ｜ Play seriously

We used a ping -pong and water bottle to make a bubble hourglass before

From everyone's submission feedback

Xiaobian found that the phenomenon of vomiting bubble that wants to achieve cyclical vibration is more stringent for table tennis density

So today we change our thoughts

Make the water bottle vomiting bubbles happier

experiment equipment

The marked cup, water bottle, hot water, pigment

experiment procedure

If we buckle the bottle loaded on the plane

Although there will be small gaps in contact with the plane

But we know that the air pressure balance inside and outside the bottle will prevent the water from flowing out

So there will be no water coming out

There will be no bubbles in

Since the air pressure can prevent the flow of water from flowing out

Then you can use more use and can inhale more air in

For example, if we change the water in the bottle to hot water

We found that the bubbles began to gurgue into the bottle pouring in

At this time, if we press the bottle (be careful)

Bubble flow will become small and frequent

On the contrary, if we tilted the bottle a few times a little

Interesting throughput will happen

(Added pigment for easy observation)

The water in the bottle flows a small beach at the mouth of the bottle

Then gradually sucked back to the bottle

When the overflowing water is sucked back

There will be a part of the air entering the bottle

Form a few bubbles

Everyone can also challenge the maximum angle of tilt

Original understanding

From the gas state equation, we can know that when the volume is almost unchanged, as the temperature in the bottle decreases, the air pressure above the bottle decreases. The pressure on the inside of the bottle mouth is the sum of the air pressure and water pressure in the bottle. As the air pressure in the bottle gradually decreases, the air pressure in the inside of the bottle mouth gradually smaller than the atmospheric pressure, and the external water or air will be sucked into the bottle.

Different from the experiments that caused the bottle to be heated into the water in the water that caused the bottle in the water during middle school, because the temperature in the bottle gradually decreased as the hot water in the bottle gradually decreased, the pressure in the bottle will not be the pressure in the bottle. Instantly becomes too low, so that the inside and outside of the bottle mouth can appear in the bottle pressure in the bottle.

If the bottle mouth is more tight, the gaps formed by the bottle mouth will be smaller, and the bottle body is slightly raised when the bubbles are poured in. The amplitude of the whole pressure difference-the influx of the influx of air bubbles will also be smaller, and a series of short and higher bubbles will be formed.

If we choose to tilt the bottle, the pressure in the bottle is not enough to overcome the flowing water from the huge gap, so the bottle mouth will leak a part of the liquid. And because of the tension of water and the adsorption power of the bottle mouth, a series of factors will make the flowing liquid forming a curved liquid surface wrap the gap in the tilt, and it is difficult for water to continue to flow out. And because the pressure in the bottle gradually decreases, the flowing water will be gradually sucked back, and when the bubbles are brought into a certain air bubble, it will enter the next cycle when the inside and outside of the bottle will be balanced.

- END -