Specific volume - Wikipedia
An introduction to density, specific gravity and specific weight - formulas with examples. Density is defined as mass per unit volume. Density is a physical property - constant at a given temperature and pressure - and may be unit defined as the ratio of the density of a substance to the density of water - at a specified. Specific gravity is a concept related closely to density. Density is mass divided by volume, whereas specific gravity is the density of a material being As a result, water becomes less dense with increasing temperature. Bulk Density: Definition & Calculation. What is Specific Volume? - Definition, Formula & Units. Coarse Aggregate: Definition & Density. Gauge.
On the left is an object highly packed with particles. That means it has a high density. On the right is an object with a low density. You can see that the particles are not packed tightly but that there are fewer particles occupying the same volume.
RMP Lecture Notes
To find the density of an object, we divide its mass by its volume. For example, take an object with a volume of four liters and a mass of one kilogram. We plug these numbers into the density formula and discover that its density is 0.
The Formula for Specific Gravity The formula for specific gravity, given that the reference substance is water, is the density of the object divided by the density of the water.
Here, we use the Greek symbol Rho to indicate density. While changing the amount of substance alters mass and volume, the density of the material remains the same and is a physical property of the substance.
Mass Mass measures how much material is present in a substance. The mass of a substance is often given in grams SI or pounds English.
- Specific volume
- What is Specific Gravity? - Definition, Formula, Calculation & Examples
Scales are often employed to determine the mass of a substance since weight is a function of mass and gravity. Since gravity is very nearly the same over the surface of the Earth, weight becomes a good indicator of mass.
Increasing and decreasing the amount of material measured increases and decreases the mass of the substance.
Weight to Volume conversions
Volume Volume describes how much space a substance occupies and is given in liters SI or gallons English. The volume of a substance is determined by how much material is present and how closely the particles of the material are packed together. As a result, temperature and pressure can greatly affect the volume of a substance, especially gases. As with mass, increasing and decreasing the amount of material also increases and decreases the volume of the substance.
For example, 10 grams of freshwater has a volume of 10 milliliters.
How Are Density, Mass & Volume Related? | Sciencing
Flow Rates We generally want to know how much material is coming into or out of a process, so we measure the "flow rate": The dot is often used to mark a "rate" per unit time. Volumetric flowrates are indicated by V, Q, or F. Usually, the volumetric flow rate is the easiest to measure.
It can then be converted to mass flow rate using the density: Most industrial flow measurement devices really measure the flow velocity. The volumetric flow rate is then calculated from the velocity and the cross-sectional area of the pipe: Doing this makes some assumptions about the velocity distribution, but for the most part we'll wait until our fluid mechanics course to worry about those.
Moles A Mole is a measure of quantity of substance or the number of particles. A gram-mole mol, gmol of a species is the amount of a species whose mass in grams is numerically the same as its molecular weight.
Carbon Dioxide has a molecular weight of 44, so 1 mol of CO2 contains 44 grams.
If the molecular weight of a substance is M, then there are M grams per gram-mole. This means you can use the molecular weight as a conversion factor for going from mass to moles.
To simplify engineering problems, we will also use kilogram-moles kgmol and pound-moles lbmol, mole.