Properties of matter, Civil Engineering

Properties of Matter:

  • Due to surface tension, the free surface of a liquid behaves like a stretched elastic membrane tending to contract so as to have minimum surface area. It is measured as the force per unit length perpendicular to an imaginary line on the liquid surface.
  • Pressure is defined as the ratio of the force to the area on which it acts. That is : P = F /A

The fluid pressure at a point within a fluid is given as :

P = h ρ g

  • According to the Pascal's law, pressure applied at any point on the surface of a given mass of an enclosed liquid at rest is transmitted over the whole liquid.
  • Archimedes' principle states in which there is an apparent loss in the weight of a body immersed in a liquid (or gas) and this loss of weight is equal to the weight of the liquid (or gas) displaced by it.
  • An ideal fluid is incompressible and its flow is laminar, non-viscous and irrotational. A flow of liquid is of two types. Those are given below:

(i) Streamline motion, and

(ii) Turbulent motion.

  • An equation of continuity is a consequence of the principle of conservation of mass of liquid and for streamline flow of a liquid is

a1 v1 = a2 v2

where a1 and a2 are the areas of two different cross-sections of a tube of flow and v1 and v2 respectively are the velocities of flow through these sections.

  • The Bernoulli's equation is an expression representing the principle of conservation of energy for liquids. It is expressed as:

P/ ρ + gh + v2/2= constant

  • The property by virtue of which a liquid opposes relative motion between its different layers is called viscosity. It is similar to the frictional force experienced by solids in motion.
  • The property of matter to regain its natural shape and size or to oppose any attempt to deform it is called elasticity.
  • The internal restoring force, arising due to an external deforming force applied on a body, and acting per unit area of cross-section of the body is called stress. The stress may be longitudinal, compressional and shearing.
  • Strain is defined as the change in dimension of a body per unit dimension.

Strains are of three types, namely

(i) Linear strain,

(ii) Volume strain, and

(iii) Shearing strain.

  • Hooke's law states that, within elastic limit, the stress is directly proportional to the corresponding strain.


Posted Date: 1/23/2013 6:15:54 AM | Location : United States

Related Discussions:- Properties of matter, Assignment Help, Ask Question on Properties of matter, Get Answer, Expert's Help, Properties of matter Discussions

Write discussion on Properties of matter
Your posts are moderated
Related Questions
Durability requirements for Concrete Even though the alkaline environment of concrete protects steel, carbonation of hydrated cement may decrease the effective protection. The

if the diameter of the base remains constant by what factor should the altitude be multiplied to produce a cone with twice volume as the original

Ask question Design the pavement by group index method for heavy traffic using following subgrade data Soil passing 75micron sieve =65%,liquid limit =40%plastic limit =20% #Min

Calculate the Amount of Import or Export For the project site shown in Figure, the amount of import or export to bring the entire site to elevation 90-ft is most nearly:

individual wall methods benefits?

Question While designing lateral resistance of piles , have to engineers only use earth pressure against pile caps simply? Answer In case of designing lateral loa

Calculate the Cubic Volume of Crushed Stone A symmetrical running track is being constructed in the configuration and dimensions as shown.  The cubic volume (CY) of crushed st

Magnitude of torque - bending moment: A prismatic bar of hollow circular cross-section along with outer and inner diameters 100 mm and 80 mm correspondingly, carries a bending

preparation and uses of concrete

investigation of strength properties of black cotton soil stabilised with fly ash and georeinforcement