The big ones are not necessarily heavy, and the small ones are not necessarily light

Large is not necessarily heavy, and refers to objects with large volume and small specific gravity, such as cotton, foam. Small is not necessarily light, refers to small size, but large weight, such items are famous metals, stones.

There are many such items as cotton, foam, balloons, etc., these objects are large in size but will be very light in mass, for example, gold, silver, copper objects are small and heavy; This is related to the density of the object, the higher the density, the lighter the mass, and the smaller the density, the heavier the mass.

The big ones are not necessarily heavy, and the small ones are not necessarily light

Watermelons are heavy and apples are small. The bread is fluffy and looks big, but not heavy, so: the drink is heavy, the bread is light Return to the size, light and heavy Try it with your hands.

The solid ball is heavy and the leather ball is light. Solid balls are made of metal, and although they look small, they are heavy.

Watermelons are heavy and apples are small. The bread is fluffy and looks big, but not heavy, so: the drink is heavy, the bread is light Return to the size, light and heavy Try it with your hands.

The solid ball is heavy and the leather ball is light. Solid balls are made of metal, and although they look small, they are heavy.

A: ** and sponges. The volume of the sponge is several times larger than **, but the weight is not as heavy as **. The reason is that the specific gravity of sponge is too light for **.

The bread is fluffy and looks big, but not heavy, so: the drink is heavy, the bread is light.

The solid ball is heavy and the leather ball is light. Solid balls are made of metal, and although they look small, they are heavy.

The basketball looks big, but it's hollow, so it's light.

Of course not, can you directly compare the weight of a large ball of cotton or a small piece of iron?

The weight of an object on the earth is physically expressed by mass, and the size of the mass is related to the volume and density, that is, m=pv, where m is the mass, p is the density, and v is the volume.

Not necessarily, it has to do with the volume of the object.

For the same volume, the denser object is heavier.

At the same volume, the dense solid metal is heavier, and the less dense is light.

Not necessarily, it has to do with the volume of the object.

For the same volume, the denser object is heavier.

Not necessarily, it has to do with the volume of the object.

For the same volume, the denser object is heavier.

At the same volume, the dense solid metal is heavier, and the less dense is light.

You're not right!! The heavier with the higher density and the smaller one with the same volume, the lighter with the small density!! The density of oil is less than that of water!!

In the oil-water mixture, each small droplet dispersed in the water contains a huge number of molecules, and the particle size is generally larger than microns, which floats under the action of buoyancy.

No. High density means that the weight is relatively large under the same volume.

No, weight is mainly determined by two factors: density and volume, theoretically it is determined by density and volume, but in fact, there are many factors that will affect the weight of the object, so it is not right to use the density to see who is heavy and who is light.

Mass = Density Volume, when the volume is the same, the higher the density, the heavier.

As for oil and water......I think it's because oil doesn't dissolve in water, and because it's not much denser than water, it can't pass through the water and sink to the bottom.

No, weight is not only related to density, but also to volume.

1.According to the variation of the zhi density formula, DAO: m=v or v=m, where m is the quality specific quantity and is the density.

Degree, v is the volume. It is possible to calculate the mass and volume of an object, especially for some problems where the mass and volume are inconvenient to measure directly, such as calculating the volume of an irregularly shaped object, the mass of a monument, etc.

2.The density of p at any point in an object is defined as:

where v is the volume element containing the p point; m is the mass of the volume element. In the centimeter-gram-second system, the unit of density is gram centimeter.

The same volume, the greater the density, the greater the mass, and the heavier it becomes.

Non-quality is determined by both volume and density.