What is convection, Physics

Assignment Help:

Although conduction does occur in liquids and gases also, heat is transmitting in these media mostly by convection. In that phenomenon, the real motion of the material is responsible for the heat transmit. Familiar examples added hot-air and hot-water home heating objects, the cooling objects of an automobile engine and the flow of blood in the system.

You probably have warmed your hands by taking them over an open flame. In that condition, the air directly above the flame is expands and heated. As a result, the density of this air reduces and then air rises. Air flow at a beach is an example of easy convection. When the heated substance is forced to move by a pump or fan, the process is called as forced convection. If it were not for convection present, it would be very hard to boil water. As water is boiled in a kettle, the boiled water expands and arises to the top due to its density is lowered. At that same point, the denser, cool water at the end surface sinks to the bottom of the kettle and is heated.

 


Related Discussions:- What is convection

Correction of short sightedness, Correction of short sightedness To rem...

Correction of short sightedness To remove this defect a convex lens is used in front of eye.

What average force does the bullet exert on the gun, A 7.25-g bullet is fir...

A 7.25-g bullet is fired from a gun. The muzzle velocity of the bullet is 223 m/s. Suppose that the bullet accelerates at a constant rate along the barrel of the gun before it

Becquerel, Becquerel; Bq (after A.H. Becquerel, 1852-1908) The derived ...

Becquerel; Bq (after A.H. Becquerel, 1852-1908) The derived SI unit of activity, described as the activity of a radionuclide decreasing at rate, on the average, of one nuclear

Define laplace correction, He customized Newton's formula suppose that prop...

He customized Newton's formula suppose that propagation of sound in gaseous medium is adiabatic process. For adiabatic method

What is extrinsic semiconductor, (i) It is also known as impure semiconduct...

(i) It is also known as impure semiconductor. (ii) The phenomena of adding impurity is known as Doping.

Si unit of force, UNIT: SI unit of force is Newton (N).

UNIT: SI unit of force is Newton (N).

What do you mean by ant reflecting films, Q. What do you mean by Ant reflec...

Q. What do you mean by Ant reflecting Films? When a beam of light travels normally from a medium of refractive index µ 2 to a medium of refractive index µ 1 , a part of light

Evaluate the height to which the center of the baton travels, A baton twirl...

A baton twirler throws a spinning baton directly upward. As it goes up and returns to the twirler's hand, the baton turns through four revolutions. Ignoring air resistance and assu

Discuss the carnot cycle of operation, Discuss the Carnot cycle of operatio...

Discuss the Carnot cycle of operation and reduce the expression for efficiency. Carnot engine is works on the principle of Carnot cycle made up of four stages are represented as sh

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd