Again from a scientific point of view concept of density is very important. It is used in various experiments of physics and chemistry where precise measurement of the density of a substance is required to carry out necessary calculations.
From density formula, if we have the knowledge of mass and volume of a substance we can easily calculate its density as density is defended as mass per unit volume.
In this article, we will not concern us about how to find density and about calculating density. Here we would rather look at density examples where we have applied the concept of density to explain some phenomenon around us. The density of any material also depends on its temperature for example if we continuously heat iron it can change its state.
It takes extremely high temperatures to change iron from solid to liquid. Now when iron changes from solid to liquid its density also changes with the increase in temperature. So, the increase in temperature of a substance usually results in a decrease in its density and decrease in density results in increased volume.
Density is also affected by pressure and this dependence is most pronounced in gaseous states. When we increase pressure on say, gas in a container, its volume decreases thereby decreasing its volume. Density difference has profound effects in phenomenon deriving the world around us. For instance, take an example of monsoon in India. All else being equal, a fluid of greater density will flow through a pipe with a lower pressure, velocity, or height, respectively.
Engineers rely on Bernoulli's equation when they design dams and large-scale plumbing projects. Bernoulli's equation also accounts for the ability of an airplane to fly, though this phenomenon relies primarily on pressure and velocity, not density.
However, density plays an additional role in flight. The weight distribution on board the aircraft changes as the engines consume fuel, so the density of the plane is not uniform. This loss of mass results in a shifting center of mass, and pilots must make adjustments during flight to account for these changes. Allison Boley writes both fiction and nonfiction, having placed as a semifinalist in the international Scriptapalooza Semi-Annual Television Writing Competition.
Boley graduated summa cum laude from the Barrett Honors College at Arizona State University, where she is concurrently pursuing her doctorate in physics. Oil and vinegar being poured into a bowl as examples of density. Equal to 20 degrees C 68 F and 1 atmosphere of pressure. Our examples below are all at NTP.
Equal to 0 degrees C 32 F and 1 atmosphere of pressure. Everyday Density Examples Examples of relative density, or different densities in different substances, occur throughout everyday life. In an oil spill in the ocean, the oil rises to the top because it is less dense than water, creating an oil slick on the surface of the ocean. A Styrofoam cup is less dense than a ceramic cup, so the Styrofoam cup will float in water and the ceramic cup will sink. Wood generally floats on water because it is less dense than water.
Rocks, generally being denser than water, usually sink. This obvious example illustrates the power of science in real life. Many widely used hardwoods, such as ebony , mahogany and lignum vitae , are dense enough to sink in water, and a few rocks, such as pumice, are light enough to float.
All that matters is the relative densities of the substances. The densities of common solids, liquids, and gases are listed in textbooks and handbooks. Scientists define density as the mass of a substance per unit volume. It is the relation between the mass or weight of one unit of a material and the volume of that one unit. Density cannot be directly perceived or measured.
Physiological density calculates the amount of people per arable square kilometer of land. Arithmetic density is the amount of people per square kilometer of land. Lastly, agriculture density is the number of farmers per square kilometer. The population density of an area can be one of the most important determining factors for business and marketing planning. It is not enough to know how many consumers live in a specific state or city.
You can track changes and growth within the population, as well.
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