Contemplation is to observe, think, hypothesize, and verify, which is the name of a popular science program. The experiments are not complicated, and I can understand how they work.

The aforementioned experiment in which shadows can attract each other is from this show. So, let's look at the first one.

This is a free-fall experiment, which is actually somewhat similar to the Galileo cannon. However, there is a difference.

The Galileo cannon is the top ball that will bounce up, but hold the plate and balloon with your hand and let go.

As a result, they hit the ground at the same time. Isn't that counterintuitive? It was supposed to land first.

So what's the problem? In the program, it is said to be a vortex, but I think it is actually the influence of inertia.

You think, the balloon must have accumulated energy when it was held. Of course, you may say, the plate is also held, isn't there an accumulation of energy?

Aside from the kinetic energy provided by gravitational potential energy, the plate has no other external energy. This is because the plate is harder than the balloon.

Hardness is an important factor affecting deformation. I think that the hardness is greater, the less deformation. On the contrary, it is big.

Precisely because the deformation of the plate is small, it does not accumulate energy. Balloons, on the other hand, do not have much hardness, resulting in greater deformation.

Even if one is careful to hold the balloon, the balloon is still not deformed. When the balloon is deformed, the energy is in a fluctuating state.

In the process of fluctuations, the energy is transferred to the bottom. However, when the energy is transferred to the bottom, the balloon should have bounced very high.

However, in the process of small surface fluctuations, a bottom-out air flow is formed in the deformed part.

However, the air currents were quickly straightened by the balloons. After that, the elastic potential energy possessed by the balloon is carried away by the air current.

。 The second scale. Place a glass of water on each side of the balance and keep the balance balanced. In the glass on the right, put your finger into the water.

Then the glass sank. Theoretically, the finger is on the human body. And the human body is on the ground.

So, the ground provides support to the human body. And the human body provides support to the fingers.

So, the finger should have no effect. Of course, this is the ideal situation. It is said in the program that this is because of buoyancy.

I guess shouldn't the buoyancy of water being squeezed and not squeezed being equal? How does it increase buoyancy?

There is only one answer, and that is that each horizontal layer of water has buoyancy. The buoyancy experienced by an object is the total buoyancy of the body of water.

When the finger is inserted into the water, the level increases. And the buoyancy of the water body is determined by the horizontal layer, so the buoyancy increases.

We know that force is the embodiment of energy, and buoyancy naturally corresponds to energy. And energy and mass are equivalent again.

Since the buoyancy increases, the mass necessarily increases. In this way, the right water cup sinks. The third is the scale.

There were still two glasses of water. Inside the two cups were a ping-pong ball wrapped in a balloon, which was knotted with a rope.

Then, tie a long nail to the rope. Now, the scales remain level. Reach into the left cup and cut the rope and the balance is still balanced.

By contrasting, you will find the difference. Last time, I put my finger into the water glass, and this time I cut the rope with scissors.

What does this mean? The horizontal layer argument is flawed. In this experiment, the horizontal layer is changed.

If it's the total horizontal area, then it's complicated. According to my guess, the total area should be the same.

Well, the buoyancy does not increase. What does this mean? The water absorbs the support of the human body to the fingers, and the buoyancy of the water changes.

Again, the quality has increased. So, the glass of water sinks. Well, here it can be explained.

A ping-pong ball is in the water, and there is no other object to give it support. Therefore, whether the rope is cut or not does not have any effect.