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

Moment of inertia, moment of inertia theory and easy diagrams

moment of inertia theory and easy diagrams

Explain battery powered vehicles, Battery powered vehicles Used DC seri...

Battery powered vehicles Used DC series motors are the first choice. Recently AC motors with frequency changers are being considered.

Alpha-particle and a proton have the similar kinetic energy, An electron, a...

An electron, an alpha-particle and a proton have the similar kinetic energy. Which one of these particles has the main de-Broglie wavelength?

Determine the position of the bubble from the nearest face, A transparent g...

A transparent glass cube, of side 20 cm has a small air bubble. When it is viewed normally from the nearest face it seems to be at 0.05 cm from that face and when it viewed throug

What is the magnitude of the acceleration, A toy train moves in a circle of...

A toy train moves in a circle of 8 meters radius with a speed of 4 meters per second.  What is the magnitude of the acceleration of the train? Ans: The magnitude of the acce

Science/math, an oven is turned on at a room temperature of 20C and it take...

an oven is turned on at a room temperature of 20C and it takes 10 min to reach a temperature of 190C.a try of cookies is placed in the oven to bake for 10 min.the oven is then turn

Write any three findings of binding energy curve, Q. Write any three findin...

Q. Write any three findings of binding energy curve. (i) The binding energy per nucleon arrive at a maximum of 8.8 MeV at A = 56 corresponding to the iron nucleus (26Fe56). Th

Suppose the sides of a closed polygam represent vector arran, Suppose the s...

Suppose the sides of a closed polygam represent vector arrangend head to tail rule , what is sum of these vectors ?

Nearly free electron model, how cah i get the band gap by considering a wav...

how cah i get the band gap by considering a wavefunction including bloch function

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