What is the density of the stone

Marble is generally 2.2.7g/cm3;
Granite generally in 2.3.0 grams per cubic centimeter;
Limestone is generally 2.2.8g/cm3;
Slate is generally 2.2.9g/cm3

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1. Calculation of apparent density of stone Take the dry stone with mass of M (unit: G) and saturate it with water, then put it into the jar, fill it with water and try to exhaust the air, and then close the bottle mouth with glass sheet to get the total mass of M1. Then pour the stone and water out of the jar, fill the bottle with water, and then close the bottle mouth with glass sheet to get the mass of M2. Let the water density be ρ w (unit: g / cm3), What's the apparent density of stones? Which master can explain this problem clearly? It's better to be more detailed,
2. What is the density of pebbles
3. Use a glass, water and balance to measure the density of a small stone. Fill the glass with water and weigh it to 200 g. remove the glass filled with water from the balance and gently put in the small stone. When part of the water overflows, weigh it to 215 g. take the small stone out of the water and weigh it to 190 g. calculate the density of the stone
4. What is the density of lime fly ash macadam in general
5. What is the bulk density and apparent density of 5-10mm gravel?
6. If the mass ratio of two pieces of metal is 3:2 and the volume ratio is 2:1, then the density ratio is 3:2
7. There is a piece of metal with a mass of 81g and a volume of 30cm3. Find out the density of the metal and what substance it may be
8. If there are two metal blocks a and B, the density of a is 2 / 3 of that of B, and the mass of B is twice that of a, then the volume of a is the same as that of B___ ?
9. If the mass ratio of a and B is 3:5 and the volume ratio is 1:2, then the density ratio of a and B is 0______ If their masses are equal, then the ratio of their volumes is______ ．
10. The volume of the upper and lower parts of the iceberg is V1 and V2 respectively. The known density of sea water is 1.03 × 10 cubic kilogram per cubic meter, and the density of water is 0.9 × 10 cubic kilogram per cubic meter. Try to calculate the percentage of the volume of the iceberg below the water surface in the total volume
11. How many cubic meters is 1 ton pond slag equal to? Or the density of pond slag
12. What is dry density? Field dry density? Measured dry density? Maximum dry density? Wet density? And how to calculate the degree of compaction?
13. What is the principle of measuring density by sand filling method? I can't find the problems in the exercises at the back of the book
14. Calculation formula of compactness of earthwork subgrade (sand filling method),
15. Compactness calculation formula: mass of soil * density of sand / what / data given by laboratory / (1 + 0.01%). What is the second one? Sand filling method
16. Calculation steps of compactness measurement by sand filling method Do not need to write detailed steps, just write the known water content, vertebral mass, cylinder + sand mass, sand density, calculation steps. Calculate wet density, dry density, compactness!
17. Calculate the density of small stones The mass of small stone is m = 21.6, the volume of water is v = 40, the volume of water and small stone is V2 = 47, the volume of small stone is v = 7, the density of small stone is p = m / v = density!
18. The process of measuring and calculating the density of small stones Questions in Volume 1 of Grade 8
19. What is the range of bulk density and apparent density of 5-31.5 stones
20. How to calculate the amount of sand in the mortar mix? Is it not the bulk density when it is dry? Why should the moisture content be added The mix proportion of cement lime mortar should meet the requirements of construction workability (consistency), ensure the design strength, save cement as much as possible and reduce the cost. The mix proportion of M7.5 grade cement lime mortar with consistency of 70-100 mm is used for masonry brick wall （1） Materials 1. Cement: 32.5mpa ordinary portland cement; 2. Lime paste: consistency 120mm; 3. Sand: medium sand, with a bulk density of 1450kg / m3 and a water content of 2%; 4. Construction level: General I don't understand the calculation of sand consumption The answer in the book is: according to the sand bulk density and moisture content, calculate the sand consumption QS QS =1450×(1+2%)=1479(kg/m3) But doesn't the amount of sand refer to the bulk density when it is dry? Why should 2% water be added? Isn't it the bulk density when the sand contains water? What's the matter