Suction cups are often used in life, and the smooth bathroom wall doesn't want to be nailed, so someone invented a sucker hook or a double-sided adhesive hook. The double-sided adhesive hook is not easy to fall off when it is stuck to the wall. Even if you take it off, it's not sticky and can't be used. This is a disposable hook.

So many people will use sucker hooks, and they don't want to use them or want to change places. It is very convenient to take off the sucker.

What kind of scientific principle does it use? When a child is very young, he/she is curious about the things around him/her. If you explain the scientific principles in life clearly, he/she will learn a lot of knowledge. Let's use an experiment to demonstrate this scientific principle-atmospheric pressure:

Two cup

A desk calendar paper, hard, and try to find waterproof paper, because it is not easy to succeed when the paper is soaked.

Take two cups, one for experiment and the other for irrigation.

Fill one of the cups with water and make sure it overflows, so as not to leak when doing the experiment.

Take a piece of desk calendar paper, cover it on the quilt, and press the paper with one hand. Hold the cup in the other hand and turn it over, as shown in the figure below:

Then let go of the hand holding the paper and see what happens.

Wow, the water in the cup didn't leak out! ! !

This is the principle of atmospheric pressure. We are surrounded by the atmosphere, and the pressure is great, and the pressure is great. But why didn't we get hurt? That's because the inside and outside of our bodies are connected, such as the lungs. This will balance the internal and external forces and will not crush the internal organs.

Fill the cup with water and cover it with cardboard, so that there is water between the cup and cardboard and there is less air. The external atmospheric pressure presses the paper tightly on the cup, so the water can't flow down.

The principle of the sucker hook is also to press the sucker tightly on the smooth wall, and then pull the hook out and hold it. So that thing hanging on that suction cup hook can not fall off. The greater the suction, the heavier the hanging weight. There are many kinds of sucker hooks. If you are interested, you can consult the information yourself and make good use of the search engine.

There are some problems when using the sucker hook:

1. You can't suck it, but it will fall off when you suck it.

2, be sucked, can't hang heavy objects.

The first question, you need to check whether the sucker of the hook leaks water, whether the wall is flat and whether there is dirt. Wipe it clean and try again. You can wet the wall with water, which will prevent air leakage.

The second question needs to check whether the sucker is aging, whether the surface of the sucker is flat, and whether there is dirt on the wall.

Remember the principle: a vacuum must be formed, which is the main point of normal use.

By the way, I have compiled 154 simple and interesting scientific experiments, which can be done at home without buying experimental materials. The article is just one of them. You can ask me for it. I also compiled the audio picture book of 1000, and I can share it with you.

I am Wang Hao, an expert in children's science experiments, and I am on WeChat &; QQ(7572320), code: I see it. Focus on children's scientific enlightenment, improve children's practical ability, accompany children to grow up happily in interactive communication, and welcome parents and teachers to communicate!

Teacher Wang Hao's personal blog "Wang Hao", welcome to exchange and learn!