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A certain metal with a mass of 1.975t and a volume of 250dm3, the density of the metal is calculated in kilogram per cubic meter, and the metal is judged
It is known that M = 1.975t = 1.975 × 103kg, that is, the volume of the metal block v = 250dm3 = 0.25m3, ρ = MV = 1.975 × 103kg, 0.25m3 = 7.9 × 103kg / m3. According to the density table, this metal may be iron. Answer: the density of this metal is 7.9kg/m3, this metal may be iron
Density calculation
In order to measure the density of potatoes, a student hung a potato under the spring dynamometer. The indication of the spring dynamometer was 1.5n. Then he held the spring dynamometer and immersed the potato in water. At this time, the indication of the spring dynamometer was 0.3n. What was the density of potatoes (write out the calculation steps)
Potato mass m = g / g = 1.5n / (10N / kg) = 0.15kg
F = G-F = 1.5n-0.3n = 1.2N
F floating = P water GV drainage
V row = f float / P water, g = 1.2N / (10N / kg * 1.0 × 10 ᦉ 710; 3kg / m ᦉ 710; 3) = 1.2 × 10 ᦉ 710; (- 4) m ᦉ 710; 3
V = V row = 1.2 × 10 & # 710; (- 4) M & # 710; 3
The density of potato P = m / v = 0.15kg/1.2 × 10-710; (- 4) m-710; 3 = 1.25 × 10-710; 3kg / m-710; 3
How to do the technical calculation of density? For example?!
m1 +m2 / (m1/p1+m2/p2)
=m1+m2 *(p1p2/m1p2+ m2p1)
With the density of water and alcohol, how to calculate the density of mixed wine?
Be quick and despise teachers
Total mass / volume of water and alcohol
How is the density of matter calculated?
Water, iron, air, etc?
Calculated by density formula
The ratio of the mass of a substance to its volume, that is, the mass of a substance per unit volume, is called the density of the substance. The symbol ρ. The international main unit is kg / m ^ 3, and the commonly used unit is g / cm ^ 3
The mathematical expression is ρ = m / v. in the international system of units, the main unit of mass is kilogram and the main unit of volume is cubic meter. Therefore, the mass of one cubic meter of material is taken as the density of material. For non-uniform material, it is called "average density"
2. For example, the density of water at 4 ℃ is 10 ^ 3kg / m ^ 3 or 1g / cm3 (1.0 × 10 ^ 3kg / m ^ 3). The physical meaning is: the mass of water per cubic meter is 1.0 × 10 ^ 3kg
The average density of the earth is 5.5 × 10 ^ 3 kg / m ^ 3
Under the standard condition, the average density of dry air is 0.001293 × 10 ^ 3kg / m ^ 3
Density of common nonmetallic solid, metal, liquid and gas: (unit: kg / m ^ 3) gold: 19.3 × 10 ^ 3, silver: 10.5 × 10 ^ 3, steel: 7.9 × 10 ^ 3
The formula of density? 絤 / V can be used not only to calculate the density of matter directly, but also to measure the density of matter
The calculation formula of density? 絤 / V can not only calculate the density of matter directly according to the formula, but also measure the (mass and volume) of matter
Use formula () to calculate the density of matter
P = m / v. density equals mass divided by volume
The formula for calculating the density of matter?
I want to know if a substance is real. The density of substance is fixed
For a given substance, its density is fixed
The calculation formula of density is p = m / V, where p is the density of matter, M is the mass of matter, V is the volume of matter, and the mass ratio of matter to volume is
Its density, which is also the definition of density formula, only this algorithm
Any questions are welcome
I hope my answer can help you~
Is carbon dioxide more or less dense than air
It's bigger than air
The average molecular weight of air is 29
Examples of CO2 density greater than air (3)
Carbon dioxide fire-fighting can not explain that the density is greater than air, can only explain that it is not combustible!
When carbon dioxide rushes into the balloon, the sinking of the balloon can not be explained very forcefully, because the balloon itself has weight
In other words, it's much tighter: no matter how big the balloon is, it's sinking. Hey!
(1) Carbon dioxide can be collected by the upward exhaust air method
(2) Two lighted candles are lit and covered with a glass. The short one goes out first
(3) No matter how big the balloon is, the balloon will sink
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