Seeking knowledge of a physical phenomenon, what kind of physical phenomenon is it?

It doesn't matter, as long as there is communication with the outside, it can be pressed out without sealing and causing a vacuum. It is possible to refer to how some toilets work.

Problem 2 is not possible, because if the lower part is to flow out first without a compartment, a vacuum must be formed, and the vacuum cannot press out the liquid.

First of all, the first question is wrong.

The principle is wrong, we know that kind of thing is connected to the bottom of the bottle through a tube, and the two ends of the tube (one end is connected to the atmosphere, and the other end is connected to the liquid in the bottle) when it is not squeezed, the pressure at both ends is the same (if it is different, for example, the pressure at the outer end is greater than the pressure at the inner end, then when there is no extrusion, the air will be sucked in, which is impossible). If the outside is larger than the inside, then the liquid will flow out automatically, which is also impossible. ）。

When we squeeze, we put a pressure on the liquid inside, because the pressure at the inside end is greater than the pressure at the outside end, so the liquid will flow out. It's like a water gun.

The second one shouldn't be, the liquid is inherently fluid, you have to let the top one not come down, it will soon become solid.

The liquid will come out on its own, and it can be squeezed without air, stupid, and the volume is reduced, so it can't come out, such a simple question.

You ask so many questions, and you don't have a purpose, just forget it, physics, research needs to have a purpose, you need to achieve a goal, a meaningful goal.

Wrong, there is an atmospheric pressure at the nozzle, so the inside of the bottle must be combined with the outside, so that there is also an atmospheric pressure on the liquid surface to press out the liquid, and it has nothing to do with whether it is full or not.

For question two:

It's not possible, the liquid is a whole, when it is completely full, if you want to keep it full and squeeze out the liquid, you have to squeeze the bottle hard to make the bottle smaller.

Is it the Tyndall phenomenon?

When a beam of light passes through the colloid, a bright "pathway" can be observed in the colloid from the vertical direction of the incident light, which is called the Tyndall phenomenon, also known as the Tyndall effect.

Is it the scattering of light through the colloid? It's called the Tyndall effect.

The change in the center of gravity means that gravity does positive work and brings kinetic energy to the human body. And this kinetic energy needs the force provided by the human shin to do negative work and consume this kinetic energy.

In this buried fibrillation problem, the kinetic energy theorem is mainly applied, after landing, the process of the center of gravity falling is the process of tibial force, in the high bending fiber, the vertical silver position of the center of gravity changes, which means that gravity does work.

According to the kinetic energy theorem, the process of the center of gravity falling after landing is the process of tibial force.

If the center of gravity is raised or lowered, the distance you travel will change.

It's hard to say: when the gas is compressed, the energy of the gas is actually reduced. At the moment of compression, the temperature of the gas increases.

However, the subsequent heat transfer will bring the temperature of the compressed gas to the same level as the temperature of the outdoor atmosphere, and the volume will decrease, and the potential energy of the interaction between air molecules will be weakened, so the internal energy will be reduced, which is not easy to explain Because the energy of the compressed gas is reduced, at the same time as the instantaneous release, in order to maintain the energy balance with the outdoor atmosphere, it will instantly absorb a part of the energy from the outside air, and the water vapor in the air will decrease because of the decrease in energy, and the temperature will decrease, and the white fog you see will appear Hehe.

The temperature inside and outside the ball is the same, it should be easy to understand, basketball is not a thermal insulation thing, after the system is stabilized, the heat inside and outside the ball will be exchanged to maintain the energy balance, otherwise convection will be formed, so that the system is unstable

The pressure decreases, the internal energy decreases, the temperature decreases, and the surrounding water vapor liquefies into small water droplets (sorry).

When the pressure decreases, the gas does its work externally, so the internal energy decreases, and the temperature decreases

**Because the pressure of the gas in the basketball is too large, why is the pressure strong, because the temperature inside is too high to expand, when**, the hot air inside comes out and encounters the cold air outside to liquefy to form a white fog, which is the reason for these phenomena.

When the pressure decreases, the internal energy of the gas decreases, so the temperature decreases.

The ice is colder....Because the ice melts and absorbs heat when it comes into contact with your hands....Water won't....Less endothermy....So....

Because 0 is the melting point of ice, when you touch it with your hand, it will absorb heat and melt, that is, compared with 0 water, when you touch it with your hand, the ice not only absorbs the heat transferred due to the temperature difference, but also melts and absorbs part of the heat, so you will feel colder.

Light is also energy. It's going to be consumed. Depending on the wavelength there is also a certain range.

Light is made up of photons, and without a light source, it cannot provide photons, and this beam of photons will dissipate.

Light is a kind of wave and wave has energy, with energy, there is a chance to be converted into light energy with other energy, so as to transform into other forms of energy, of course, this energy will not disappear, in fact, form energy can also do work on the outside world, into energy such as mechanical energy, internal energy and the like. So the energy of light does not travel and does not dissipate. The actual scientific community does not have a thorough understanding of light (waves and grains).