Is density a property or a property of an object?

There are also many omissions and imperfections in our textbooks, such as density is a property or property of matter, and the textbook gives a very vague explanation.

The textbook says that density is a property of matter, and density can change with the change of conditions, if so, then density should be a property of matter; Whereas, properties are possessed by every substance and do not change with external conditions. Textbooks confuse attributes with characteristics. In the book, it is still said that ** is a property of matter, and then it is said that this property is a property, and then it is said that it is a property of matter.

The textbook is so vague that students or teachers will question it.

In my opinion, it is true that the density can be changed, for example, a pure gas, due to the atomic arrangement of the gas, determines that the gas will always fill the whole container, so the volume of the container changes, and the density decreases and increases accordingly. In addition, according to the principle of thermal expansion and cold contraction, the expansion and contraction of a substance will also affect its density.

And I don't think that a certain property that can be changed is a property, for example, oxygen, which can supply the body's metabolism, is a property of it, and this property cannot be changed, because it seems that there is no substitute for oxygen to supply the organism with respiration. Once this property of oxygen changes, life becomes extinct, and it has not changed for hundreds of millions of years since the birth of the earth.

On the other hand, the form of matter, which should belong to a property that is not unique to a certain substance, should belong to a property common to matter. And this property can be changed, and it is not a property in the true sense of the word.

In this sense, density is not a property, and I prefer that it is a property of matter. Taking a step back, we might call it a peculiar property, a property that can identify matter, but this does not seem to contradict reality, and the textbook is not very faulty.

Maybe you say that we really don't have to nitpick and make a big fuss about small words. However, textbooks should be forbidden, or improved, as an object of educating a generation, especially to educate us on issues that we do not understand.

So at present, can we think that property is a big concept, covering the concepts of properties, properties, etc., so it is not wrong to say that density is a property of matter? This is one of them. Second, according to the basic spirit of the "Physics Curriculum Standards", in junior high school, as long as there is no scientific error in physics concepts and laws, there is no need to strictly investigate their rigor, and the key is to let students know the process of knowledge formation.

Thus, it is also permissible to say that density is a property of matter.

Just as light can only be in a straight line when it travels in a homogeneous medium, and it is rarely mentioned nowadays, we don't necessarily have to study a few words thoroughly, but we should understand physics, physics, and understand the meaning of physics' proper nouns. Therefore, we may ignore these words when we study, but we can never stop searching for the truth. That's the perfect answer.

Density is a property of an object that changes with the change in the state of the object or with a change in temperature (or other factors, the two most common).

The properties of an object, such as mass and inertia, do not change with the above factors.

Density is a general property of an object, the density, apparent density, bulk density, and bulk density of an object.

It is one of the basic properties of an object.

It is both an attribute and a feature.

Is there a difference, is it an intrinsic property of the object.

Because the density of the same substance is the same, it does not change with the change of the mass and volume of the object; The density of different substances is generally different.

Note: The density of the same substance can change when external factors such as temperature, state, pressure, etc. change.

The density of the gas is variable, for example, the volume of the cylinder containing oxygen used for welding (or hospital) does not change, but the quality of oxygen in the cylinder decreases, and the density of the gas in the cylinder decreases continuously from =m v.

The density of the human body is only g cm, which is only a little more dense than water. Gasoline is less dense than water, so oil stains you see on the road will float on the water. Seawater is denser than water, so it is easier for the human body to float in seawater.

The density of the Dead Sea reaches a density greater than that of the human body, so people can float in the Dead Sea. ）

From a scientific point of view, this phenomenon is due to the fact that the temperature changes the inherent properties of the object.

The main reason is that when the temperature of the object changes, due to thermal expansion and contraction, the volume increases or decreases under the condition of the same mass, resulting in a change in density. In the case of water, for example, water is in a liquid state, and when the temperature drops below freezing, the water solidifies into a solid and becomes less dense.

<> more detailed, the change in the state of the object caused by the temperature conduction segment changes the properties of the object, i.e., the state, and thus the density.

[For the same substance, the ratio of mass to volume is the same; The ratio of mass to volume is generally different for different substances. 】

This shows that the "mass-to-volume ratio" is a property determined by the type of substance.

In physics, the physical quantity "density" is introduced to represent this property.

Therefore, density is a physical quantity that represents the properties of matter.

No.

Properties: properties that are unique to the object and not found in other objects;

Attributes: properties of objects belonging to that class;

For example: people: nose, eyes, mouth are all human attributes;

But: what distinguishes you from others? Find this is the attribute :

The nature inherent in the thing itself. It is the inevitable, basic, and inseparable property of matter, and it is also the manifestation of a certain aspect of the nature of things. Things of a certain quality often exhibit a variety of attributes.

There is a distinction between essential and non-essential attributes.

Unique Attributes: Attributes (characteristics, characteristics) that are common to all kinds of things but not to others. For example, living objects in nature are unique properties of living things. When the peculiar properties of a thing are reflected in a person's mind, the concept of that thing is formed.

I saw such a sentence in the physics book of the third year of junior high school (printed on April 1, 11 years of the Renjiao Edition): Density is one of the basic properties of matter, and each substance has its own density.

But I saw in another Anchu 3rd physics e-book (printed in June 06 of the Renjiao Edition) that density is the basic property of matter, and each substance has its own density.

Properties, of course, and "properties" refer to "proprietary properties" that other substances do not have

For example, the fluidity of liquid water is a property, because not all substances are fluid, such as magnetism and so on.

Mass is a property of an object because the ratio of mass to volume is equal to mass per unit volume. The mass per unit volume of different types of matter is generally different, and it can be seen that the mass per unit volume reflects a property of matter, and in physics, density is used to express this property of matter.

'''Density is a property of matter'''Objects and substances are very different, for example, a car made of iron, iron is a substance, a car is an object, and density is the property of the material iron, regardless of what object it is made of. A characteristic is a special property that is changeable and does not change under any circumstances. Density changes when pressure or temperature changes, so it is a characteristic.

Density is a property of matter. Because substances are divided into elemental substances, compounds, and mixtures, while objects do not have this division.

Characteristics are: some have, some do not, and the difference produced is called a characteristic, that is, the meaning of the characteristic includes the difference. Density is what a substance has, and there is no difference between having and not having it.

So it's a property of matter. It's not the properties of matter, it's not the properties of objects.

Unpublish.

Tan Yue Invincible2013-7-21 10:31

Landlord, I still don't understand a property of matter, which is a property of the property.

are the properties that matter has. Not properties, properties are specific to certain substances.

It is generally said in books that "density is a property of matter".

However, 1) Matter consists of physical objects and fields (such as electric fields, gravitational fields) composed of particles, and fields do not have what is commonly referred to as density – in kilograms and cubic meters.

2) "Characteristic" means characteristic, excluding the concept of quantification, whereas density is quantitative.

Strictly speaking, density is a property of a physical object that particles are made of.

The properties of matter refer to the properties of substances that can be distinguished from each other.

Density refers to the mass of a substance contained in a unit volume at a specified temperature. It is only related to the type of substance, and has nothing to do with factors such as mass and volume, different substances, the density is generally not the same, and the density of the same substance is the same. Hence density is a property of matter.

Because density refers to the mass per unit volume, and has nothing to do with the volume of the substance, in other words, the density of the substance does not change with the change of volume and mass, it refers to the ratio of mass to volume.

I hope I can adopt it, thank you!!

The density of different substances is generally different, and the density does not change with volume and position.

Density is related to the type of substance, like density of water = 1 density of iron =

Because density does not change with mass and volume, density is a property of an object, I often see such words when doing questions, this is right, if it is wrong to see that the inverted density is proportional or inversely proportional to volume or mass, it is that he confuses you, I am okay with physics, there are other questions to ask me,