If the mass ratio of a and B is 3:5 and the volume ratio is 2:4, what is their density ratio?

If the mass ratio of a and B is 3:5 and the volume ratio is 2:4, what is their density ratio?

The density ratio is 3 / 2 to 5 / 4, i.e. 6 to 5

When the volume ratio of a and B is 2:1 and the density ratio is 3:4, the mass ratio of a and B is 2:1?
rt

Mass ratio of a and B metals
=(2*3):(1*4)
=6:4
=3:2

The mass ratio of a and B is 3:5, the volume ratio is 2:4, the density ratio is (), the mass is equal, and the volume ratio is ()

Density is equal to mass divided by volume
3/2：5/4=6：5
The mass is equal and the volume ratio is 5:6

Carbon dioxide is denser than air

Yes, it's bigger than air. To help you remember, there's a hole called dead dog hole. It's because there's a lot of carbon dioxide in it, which is deposited below. It's OK for people to go in, but the dog will die if it can't breathe oxygen

Is the density of carbon dioxide in the air high or high?
The density of pure carbon dioxide is higher than that of air, but if the carbon dioxide in the atmosphere is small in content but large in volume, its density will be smaller than that of pure carbon dioxide, because the density of gas will increase with the increase of volume. So, which is the higher density of carbon dioxide in the atmosphere than that of the atmosphere, Is carbon dioxide in the atmosphere sinking or floating in the atmosphere?

The content of carbon dioxide in the air is small. In a relatively large area, carbon dioxide floats in the air. Therefore, the carbon dioxide in the atmosphere is the same as that in the air

What is the density of carbon dioxide? Is it bigger or smaller than air?
How do you know

The average density of air is 1.294 g / L and that of carbon dioxide is 1.429 g / L under the standard condition (we usually call it the standard condition when the temperature is 0 ℃ and the pressure is 101 kPa)

Hello, friend, do you know the natural bulk density of 2-4cm gravel and the bulk density after compaction?
If you know, can you let me know?

Due to the difference of stone quality, water content and particle size, the density is quite different. Taking 1400-1500kg / m3 in the building construction manual can meet the requirements of general construction calculation (taking small value for loose and large value for dense)

When the moisture content of a material is 2%, the bulk density is 2.72g/m3

Let the mass be mg, ρ = 2.72g/m and#179 when the water content is;
Volume v = m / ρ (CM & # 179;)
Water volume V water = 0.02v (CM & # 179;)
Mass of water m water = ρ water V water = 0.02v (g)
Dry mass m dry = M-M water = ρ v-0.02v = 2.7V (g)
Dry bulk density ρ '= m dry / v = 2.7g/cm & # 179;

What are the requirements for bulk density and compact density of artificial sand? Is it acceptable if bulk density is greater than 1350kg / m3 and compact density is greater than 1500kg / m3?
What is the approximate coefficient between the two

No matter the national standard "construction sand" or the industrial standard "quality and inspection method standard of sand and gravel for ordinary concrete", there are no regulations on the bulk density and compact density of artificial sand. The density of artificial sand can be measured according to the test, generally as long as the stone powder content (mud content, mud content), gradation, strict crushing index and so on are qualified

What are the dry density, maximum dry density and optimum moisture content of sand gravel cushion?

The maximum dry density is generally 2.0-2.2, which can be determined by compaction. The best water content index is not important. The main reason is that the grain gradation of sand and gravel must be reasonable. The gravel should be of continuous grain size. If it is of single grain size, the gradation test should be conducted to determine the proportion first, and the mixture should be used as required during construction