What is the cold that gets colder, and is it a substance? How does it work? 20

Cold"with"Heat"None of them are material!

Physically, the essence of both cold and heat is temperature. The temperature is determined by the intensity of the molecular movements. The molecular motion of "hot" objects (and air as well) is more intense, while that of "cold" objects is comparatively slower.

When the molecules of two objects move at different rates (at different temperatures), after they come into contact, the molecules will collide with each other like countless billiard balls to make the molecular motion tend to be balanced. At this point, macroscopically, we see that the hot object cools down and the cold object heats up until the temperature of the two is equal.

To sum up, "the weather becomes colder" is caused by the relatively slow molecular motion of the air molecules, and "the weather becomes hotter" is caused by the air absorbing the energy of the sun and converting it into the kinetic energy of molecular motion, which makes the molecular motion intensify.

So "cold" is not a substance, but a macroscopic manifestation of the movement of microscopic matter.

Please note"The weather is getting colder"in this sentence"Cold"It's an adjective, and getting cold doesn't mean that the weather has changed"Cold"This kind of thing, but it means that the properties of the weather have changed, from warm to cold.

The adjective cold is another adjective that indicates relative, and the meaning should be harmonious"Warm"Combined to understand, there is no more"Warm"No, there is"Cold"So this sentence is to say that the weather gives people the feeling that the temperature is going to be lower than before the change.

It's a matter of geography. There are several reasons why the weather can get colder. Here's what I know.

The weather gets cold because the temperature drops, and there are several situations when the temperature drops, one is the summer in the south, due to the impact of typhoons or the arrival of the rainy season, the temperature has dropped, and the weather has become colder. In addition, when a cold front meets a warm front, the temperature will also drop, and the weather will become colder, and there will be rain or snow mixed with it. These are natural changes, and of course there are natural forces in them.

The wind blows from the ocean to the land is a warm air mass, and from the land to the ocean, a cold air mass. The direction of the wind is related to solar radiation, geostrophic deflection forces, and monsoon changes. When it comes to its energy, of course, it comes from the earth's atmosphere, it is a naturally occurring energy source, and this energy comes from the overall movement of the earth.

This question is really difficult to explain, for example, please read it patiently, I hope you can understand it.

For the time being, "cold" is compared to "poor", and "hot" is compared to "rich".

Rich and poor are not material things, they are both adjectives that measure the amount of "money". And it's relative, and a standard has to be chosen. For example, Li Ka-shing is richer than you, and the beggars on the street are poorer than you (possibly).

Neither cold nor heat is a substance, but an adjective that measures the amount of "energy" (energy has many manifestations, but hot and cold are the most common), and there is also a standard, which is how people feel.

When the energy of the surrounding environment (mainly air) is reduced in the form of heat, less than the person "carries", the person feels cold. When the weather gets cold, it means that the weather becomes cold.

It's a feeling, it's not a substance, it's the counterpart of heat, it's not absolute, it's relative.

When the temperature changes, our senses change.

There is a feeling that occurs during the process of lowering the temperature, and the initial feeling is very comfortable, which is called cool, and then it is lowered, and it will feel cold. It's just a feeling.

The relationship of this (cold) sensation to matter:

The impact of changes in external matter, such as changes in the amount of heat absorbed by matter, on us.

It's just an adjective. Don't overthink it.

It's getting colder, not because the cold works. It's because there isn't enough heat.

Cold him is a physiological phenomenon. Why call him cold!The reason for this is mainly to look at the person who made the word.

And not the scientific question you're going to pursue. If the people who make the word call it heat. So now, in the winter, everybody will say, "It's so hot, hehe."

Do you drip?

Right. This year's Double Ninth Festival is on the ninth day of the ninth month of September, that is, the arrival of October 14th in the solar calendar, today is already the third day of the sedan liquid after the Chongchun Buried Yang Festival, and my feeling is that the weather before and after the Double Ninth Festival is quite different. Will it get cold after Chung Yeung Festival?

Will this winter be cold? Let's talk about it today.

The Chung Yeung Festival is the festival on the ninth day of the ninth month of September, and September is the turn of autumn and winter, there are two solar terms of cold dew and frost, and these two solar terms are indicating that the weather is getting colder, for example, the cold dew is the dew becomes colder, and the frost is the dew condensed into frost, which is a manifestation of the drop in temperature and the weather getting colder and colder. After the Chung Yeung Festival, that is, during the cold and dew solar term, the weather should indeed become colder when the frost falls.

A: No, it's supposed to be time to get cold.

As we all know, the temperature of the human body is 37 degrees Celsius, why is it hot if it is too high or 37, and cold if it is too low or 37?

Because there are adjustment points. The setting point is located in the body's body temperature center and controls the body's temperature. Under normal circumstances, the human body temperature specified by the setting point is around 37, and the activity of the enzyme is the best.

When the body temperature exceeds or falls below the temperature range specified by the setting point, a feedback system (thermoreceptor) can send the deviation information to the control system, which will comprehensively analyze this information, compare it with the setting point, and then maintain the core temperature at a level appropriate to the setting point by regulating the effector (heat production and heat dissipation). So when it's cold, you shiver, it's muscle movement that produces heat to raise body temperature; You sweat when it's hot, and this is through the evaporation of sweat to dissipate heat. This is a manifestation of the body's internal homeostasis.

Some external factors can disrupt the temperature regulations at the setting point, such as fever. The virus invades, the temperature of the setting point is raised, and the body temperature rises. This is a positive reaction of the body, but the activity of the enzyme is affected, so it is dangerous to have a high fever of more than 42 degrees, and the enzyme is not working, and you are basically dead.

The first thing to reduce fever is sweating, because the temperature at the setting point returns to normal, the human body immediately finds that the temperature is too high, and the effector begins to regulate, so you are alive again.

Cold is not a thing, if you have to make it clear, it is fear (don't ask fear, it won't tell you), hot and cold are opposites, just like beauty and ugliness, big and small,

It's just a feeling, less heat means cold, it's as simple as that.

It's interesting, what is heat?

Why is it cold in winter and hot in summer? Some people may think that we are far away from the sun in winter, and the opposite in summer, but in fact, this idea is completely wrong, the earth revolves around the sun is an elliptical shape that is close to a perfect circle, the closest date to the earth is in early January, and the farthest distance is in early July, that is to say, it is precisely when we are closest to the earth that it is the coldest season in the northern hemisphere, which also shows that in the process of the earth orbiting the sun, the distance of the earth from the sun is not a factor that determines the temperature or cold. The correct explanation is this:

The four seasons are formed mainly because the equator and the ecliptic (the path through which the sun travels as seen on Earth) are obliquely intersected. When the Earth moves, the direction of its axis in space does not change. In winter, the sun's rays are obliquely on the ground, and the heating per unit area on the ground is less, and the days are short, and the daily sunlight is short, that is, the heating time is short, and then because of the atmosphere around the earth, it absorbs a part of the light and heat, and when the light is irradiated, the thicker the atmosphere, the more it absorbs, so it causes cold in winter.

In summer, on the contrary, the sun hits the surface directly, the days are long, and the light passes through the atmosphere and is thin, so the climate is hot. The spring and autumn rainy seasons are between winter and summer, so the climate is mild. It is because in winter, the height angle of the sun is smaller, the sunlight is obliquely shining on the earth, the energy density of the sun reaching the earth is smaller, and the earth gets less energy from the sun, so the winter is cold; And in summer, the height angle of the sun is large, the sunlight is almost direct to the earth, the energy density of the sun reaching the earth is very large, and the earth gets more energy from the sun, so the summer is hot.

Because the Earth's orbit around the Sun is an ellipse, in winter, our Earth's distance from the Sun is closer; In the summer, our earth is far from the sun.