The problem of physical density in the first 2 years, the expert teacher enters

1: Mass = Volume * Density.

2: If it is the same kind of object, according to the above formula, the larger the volume, the greater the density, if you say different objects, the larger the volume, the greater the mass, but also depends on their density.

3: According to the formula in 1, if the mass of the object is the same, the higher the density, the smaller the volume.

4: It depends on the state, the state is the same, the state is different, it can be different, for a simple example, water freezes, but the chemical properties remain the same, the density of ice is smaller than water.

5: Still around the formula in 1, in the case of the same state, the ratio between the mass and volume of the same substance is equal to the density, the density is constant, and the ratio of the mass to volume of different materials is equal to the density ratio of different substances, which is not the same.

Density, mass, volume.

Density is an intrinsic property of an object.

Volume is related to both density and mass, and cannot be judged from one side alone.

Yes, the density of some substances can be uneven, this is a special case, the general questions are uniform density of matter, and some questions have an uneven tendency to set questions, you need to judge by yourself.

The ratio between mass and volume is the density.

1.For the same substance, mass = density * volume.

2.Fixed attributes.

3.The density of the same substance is generally fixed.

4.A substance may have an uneven density, but this should not be the case in junior high school.

5.This ratio is the density.

1.Mass = Volume * Density.

2.Under the same conditions, the larger the volume of the same object, the greater the mass. Otherwise, not necessarily, such as in the phase of thermal expansion and contraction.

3.Same as 24 can. It can be done in the stage of thermal expansion and cold contraction.

5。This needs to be considered under the same external conditions, and this sentence is still problematic. There are many substances that can achieve the same density, such as alloys, etc., and the density of the third substance can be the same as that of the third substance with different proportions.

1 As long as it is the same kind of object, then its density is fixed.

2 Ibid. 3. When the mass is constant, the greater the density, the smaller the volume. It can be derived from the formula =m v.

4 Impossible. 5 It doesn't matter what its volume and mass are, as long as it's the same kind of object, then the ratio is equal, and this ratio is called density. For example, the density of one ton of iron and one gram of iron is equal.

I'm on high 1....Junior high school physics is simple. I won't do anything in high school...Depressed.

What you are talking about is the density formula: p=m v

The deformation of 1:1: v=m p When p is unchanged and v is the number sought, the larger the m, the larger the v, the smaller the m, the smaller the v, which is called proportional.

The deformation of 2: 2: v=m p When m is unchanged and v is the number sought, the larger p v is, the smaller p is, the smaller p v is, this is called inverse proportionality.

The deformation of 3: 3: p=m v When v is unchanged and p is the number sought, the larger the m, the larger the p, the smaller the m, the smaller the p, which is called proportionality.

4: Don't try algebra.

Density is the mass per unit volume According to the formula, the above three relationships can be derived.

=m v is certain, m is proportional to v, that is, unchanged, the larger m, the larger v.

When m is constant, it is inversely proportional to v, that is, m is constant, and the larger it is, the smaller v is.

Solution: m water = water v water.

M wine = wine v wine.

After mixing, M = M Water + M Wine = Water v Water + Wine V Wine V = V Water + V Wine.

From the above two formulas, it is easy to exit:

Water V Water (V Water + V Wine) + Wine V Wine (V Water + V Wine) Because the minimum requirement is: V Water (V Water + V Wine) = 10%; Wine v wine (v water + v wine) = 90%, and know: water = 1000kg m 3;

Wine = 800kg m3. Substituting the above formula can obtain: =820(kg m 3) Therefore, the density of alcohol produced by the plant should be satisfied: the density is less than that.

A: The density of alcohol produced by the plant should be less than.