Density is defined as mass per unit volume (Fig. 1-25).Density:(kg/m)(1-4)The reciprocal of density is the specific volume v, which is defined as vol-ume per unit mass. That is,(1-5)For a differential volume element of mass ôm and volume &V, density canbe expressed as PThe density of a substance, in general, depends on temperature and pres-sure. The density of most gases is proportional to pressure and inverselyproportional to temperature. Liquids and solids, on the other hand, areessentially incompressible substances, and the variation of their density withpressure is usually negligible. At 20°C, for example, the density of waterchanges from 998 kg/m' at I atm to 1003 kg/m' at 100 atm, a change ofjust 0.5 percent. The density of liquids and solids depends more strongly ontemperature than it does on pressure. At I atm, for example, the density ofwater changes from 998 kg/m at 20°C to 975 kg/m at 75 C, a change of2.3 percent, which can still be neglected in many engineering analyses.Sm/8V.

Solid, liquids and gases are made up of molecules or atoms but the behavior of these particles is…

Answered: Density is defined as mass per unit…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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A flat plate, maintained at 250 C is placed vertically in air at a pressure of 1 bar and temperature of 20 C. The plate height and width are 20 cm and 10 cm. Find the rate of heat transfer to this plate. [Ans.: 64 W].
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