Density is the mass per unit volume of any object. It is calculated by dividing the mass of an object by its volume. The volume of objects can be worked out by multiplying height by length by width. Physics (Single Science) Solids, liquids and gases.
What is density in simple words?
1 : the quantity per unit volume, unit area, or unit length: as. a : the mass of a substance per unit volume. b : the distribution of a quantity (as mass, electricity, or energy) per unit usually of space. c : the average number of individuals or units per space unit a population density of 500 per square mile.
What is density explain?
Density is a measure of mass per volume. The average density of an object equals its total mass divided by its total volume. An object made from a comparatively dense material (such as iron) will have less volume than an object of equal mass made from some less dense substance (such as water).
What is density in physics with example?
Density is the measurement of how tightly or loosely a given substance is packed into a given volume. Air, for example, is low density, much lower than human tissue, which is why we can pass through it. The same does not apply to granite. … Density is one of the basic properties of physical science.
What is density and SI unit?
Density is defined as mass per unit volume. It has the SI unit kg m–3 or kg/m3 and is an absolute quantity. Specific gravity is the ratio of a material’s density with that of water at 4 °C (where it is most dense and is taken to have the value 999.974 kg m–3).
What is the symbol of density?
The symbol for density is the Greek letter rho, What is the density of a material if 450 cm 3 of it has a mass of 200 g?
What is density in my own words?
Density is defined as how tightly or loosely packed a substance is, or to the number of things or people in a certain area. An example of density is population density, which refers to the number of people in a certain geographic area. noun.
Why is density important?
Density is an important concept because it allows us to determine what substances will float and what substances will sink when placed in a liquid. Generally, substances float so long as their density is less than the density of the liquid they are placed in. … Steel is certainly more dense than water.
Is density weight?
Density is used to measure the matter in a unit volume of an object whereas weight refers to the gravitational force applied of any object. The components of Density are mass and volume whereas, on the other hand, the components of weight are mass and gravity.
What is density in physics class 9?
Density is defined as the ratio of mass of the object to the volume of the object. Different substances have different densities. The mathematical expression for density is as follows: Density=MassVolume. The mass of a substance is expressed in kilograms and the volume is expressed in litre.
Where is density used?
The density of an object is one of its most important and easily-measured physical properties. Densities are widely used to identify pure substances and to characterize and estimate the composition of many kinds of mixtures.
What are the 3 equations for density?
- To work out density: p = m / V.
- To work out the mass: m = p x V.
- To work out the volume: V = m / p.
What is SI unit of mass?
The SI unit of mass is the kilogram (kg). … Thus, the SI unit of the quantity weight defined in this way (force) is the newton (N).
What is SI unit of density class 11?
Since, volume is measured using length, therefore, the unit of volume is derived from length. So, we have found that the SI unit of density is kilogram per cubic metre. It is represented as Kg$m^-3$.
What is the SI unit of viscosity?
Dynamic viscosity: The SI physical unit of dynamic viscosity (μ) is the Pascal-second (Pa s), which is identical to 1 kg m−1 s−1. The physical unit for dynamic viscosity in the centimeter gram second system of units (cgs) is the poise (P), named after Jean Poiseuille.