Does the density of an object change in space?

Density is an inherent property of an object, which does not change with changes in the environment, that is, the density of an object does not change in space.

The quality does not change, but the density must change. To use a simple analogy, you put a piece of plasticine in the palm of your left hand and squeeze it with both hands, then its v changes and the density also changes. This is because objects are subjected to the gravitational pull of celestial bodies in the universe, causing them to deform.

Don't listen to him, because the gravitational pull of other planets changes, the density of the object changes, but the mass does not change.

The presence of cosmic rays - gamma rays: electromagnetic rays emitted by radiative decay and have energy in the range of 10,000 (104) to 10 million (10 7) electrons, which causes the elements to begin to decay.

All things considered, the density of objects in space will definitely change!

Theoretically, the volume of the object in space will expand or shrink on the original basis due to the change of gravity, and the solid density will change if the mass is constant. But with the exception of gases, the change in density of other substances is negligible.

Yes, the object expands and contracts in heat, so its density can be said to change all the time.

No. Density = m v

Mass is the amount of matter of an object, regardless of its location.

The volume does not change under normal circumstances.

So the density doesn't change.

Nywen - Xiucai Level 2 Don't listen to him. Density is an intrinsic property of an object that does not change with changes in the environment. It's the same everywhere.

Density is a property of matter, it does not change with the change of mass and volume, and the density of the same substance does not change. It is only related to the type of substance, and has nothing to do with factors such as mass and volume.

Formula for density : =m v ( for density, m for mass, v for volume) When understanding the density formula correctly, it is necessary to pay attention to the conditions and the special meaning of each physical quantity.

From a mathematical point of view, there are three cases (true or false):

1) At a certain time, m is proportional to v;

2) m is inversely proportional to v when it is constant;

3) When v is constant, it is proportional to m.

Combined with the physical sense, only (1) is true, and (2) and (3) are false. Because the density of the same kind of matter density is constant, and it does not change with the change of volume and mass, it is impossible to understand the physical formula from the physical facts, and it is impossible to understand the relationship between the quantities in the physical formula purely from the mathematical point of view.

When the temperature drops below a certain value (critical temperature), its resistance suddenly becomes zero, and we call this phenomenon superconductivity, and there is no way to change the density.

The synthesis of superconductors belongs to the field of chemistry, to be precise, the field of materials, but it is the work of physicists to measure the physical properties of superconductors and study the superconductivity mechanism of high-temperature superconductors.

Which substance is the densest in the world?

1.On Earth, the densest is osmium metal, which has a density of but in the vast universe, osmium metal is simply a small point in the "density family". The white dwarfs in the sky are not very large, but they are surprisingly dense, 36 million to hundreds of millions of times the density of water.

In the same year, astronomers used telescopes to discover neutron stars, which are as dense as a piece of neutron star material the size of a matchbox, with a mass of 3 billion tons, and it takes more than 96,000 heavy locomotives to pull it.3There is also a new celestial body in the universe, which is denser than a neutron star, up to, which is very attractive to other objects, as long as it is attracted by it, it will be swallowed, and even light will not be spared, because it does not emit light, people have given it the image name "black hole".

It is now recognized as a neutron star. On a neutron star, the protons and neutrons of the nucleus are pressed into neutrons by a strong gravitational force, which means that the elementary particles on the neutron star are only neutrons! Neutron stars have a density of 10 to the 11th power of kilograms, cubic centimeters, which is a massive mass of 100 million tons per cubic centimeter!

A piece of cut cake is one square.

A cart of cake cutting for a suite.

The largest object in the universe is the cake cut.

I don't know, it's a diamond.

Black holes, of course!

According to the Schwarz radius, the minimum volume-to-density ratio of a black hole is:

r/m=2g/c^2

And because the relationship between the mass of the sphere and the density and radius is:

m=4nur 3 3 (n pi, u is the average density of matter).

Therefore, the relationship between the radius of a black hole and the lowest density is:

r^2=3c^2/8gnu=1·61*10^26（1/u）

A number of specific inferences arise from this:

1. The density of the earth is known to be: u=3·34*10 6 kg cubic meters, substituting the above equation to obtain:

r=6·94*10 9 m.

That is to say: when a mass as dense as the Earth is piled up into a sphere with a radius of seven million kilometers (less than 11 times larger than the radius of the Sun), its surface will make it impossible for light to escape.

2. Let the radius of the universe be 15 billion light years, i.e., 1.42.*10 24 meters, and substitut the relationship between radius and density to obtain:

u=1·14*10 -11 kg cubic meters.

In other words, if the density of our universe reaches 1·14*10 -11 (kilogram cubic meters), it can bend into a supersphere.

3. It is known that the average density of our universe is about: 1*10 -28 kg cubic meters

r=1·27*10 27 meters = 111.3 billion light years.

In other words, if our current observations of the density of the universe are basically correct, then the radius of the universe needs to be 111.3 billion light-years large for it to bend into a supersphere.

The black hole is unquestionable, its mass distorts the space around it, m pv, he is an anti-physical thing, you can see how dense it is, if it is a material, I only know that neutron stars are very dense, take a small piece of stone as big as a finger from the neutron star, put it on the ground, you can penetrate the earth.

The densest matter in the universe is a black hole, with infinite mass, infinitely small volume, and infinite density.

Fart, of course, is Xinjiang cake cutting When villager Ling bought Xinjiang walnut kernel candy, he caused a misunderstanding due to poor language communication, and the verbal quarrel between the two sides led to a physical conflict, which led to a group beating. The incident caused minor injuries to two people and damaged about 160,000 walnut candies.

The least dense element in nature is hydrogen, which has a density of about kilograms and cubic meters at one atmosphere, and the densest is osmium, which reaches a density of tons and cubic meters, which is higher than any other element! And the easiest thing to remember is water, a cubic meter of water is a ton!

a. When an astronaut enters space, the position has changed, and the mass of the slide will not change, so A is wrong;

B. Sharpen and grind a cube of wood into a wood ball, the material contained in the wood block becomes less, and the mass becomes smaller, so B is wrong;

c. The mass of the object is related to the density and the volume of the body, and the volume relationship is unknown, and the mass cannot be determined.

D. After the water freezes, the state changes, and the quality remains the same, so D is wrong, so C is selected

Air density:.

The relative molecular mass of the air.

It was 29. Air at room temperature is a colorless and odorless gas, while liquid air is a light yellow liquid that flows easily. Generally when air is liquefied, carbon dioxide.

It has been removed, so that the composition of liquid air is oxygen, nitrogen and argon, and the other components are very small and can be omitted.

The speed of sound in the air in the standard state.

For. Molar mass of dry air.

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The origin of the universe is generated, and the entire universe is encased in a space with Angzi and Tsunami.

Super-black holes, on the other hand, are much less dense, and only small black holes can exceed the density of atomic nuclei.

Black holes are the most dense.

Compressing the Earth into a single glass bead becomes a black hole.

Thanks for adopting!

It seems that the upstairs have misunderstood the topic, and the landlord's friend is asking what is the form of the densest state of matter in the universe, not what is the state of the densest object or celestial body in the universe.

The densest in the universe is the most basic particle that can be seen by human microscopic technology Quark, quark is the material that makes up electrons, neutrons and other elementary particles, and these substances are the elementary particles that make up atoms, any object in the universe is composed of atoms, quarks are currently considered to be the smallest particles that are indivisible.

The densest objects in the universe are black holes, followed by neutron stars.