Warning

 

Close

Confirm Action

Are you sure you wish to do this?

Confirm Cancel
BCM
User Panel

Site Notices
Posted: 6/5/2008 5:02:18 PM EDT
please. google, not helpful.

I just want to understand
Link Posted: 6/5/2008 5:02:55 PM EDT
[#1]
in regards to?
Link Posted: 6/5/2008 5:03:16 PM EDT
[#2]
HOW IS GOOGLE NOT HELPFUL GO GET A DAMN DICTIONARY.



Link Posted: 6/5/2008 5:08:47 PM EDT
[#3]
Conduction refers to the transport through the bulk of a material.  

It is described by Newton's Law of Conduction:

delta Q = k*(T2-T1).  Transport (delta Q) is linealy proportional to the differential in potential (T2-T1).

Convection refers to transport from the surface of the material.

(need time to prepare a simple formula describing convection)

Induction refers to the (non-contact) transport via a magnetic field.

It is described by:

L*(d2q/dt2) = (V2 - V1) or  L*(dI/dt) = delta V  The time rate of change of the rate of transport (the rate at which the transport is accellerating, d2I/dt2) is proportional to the potential difference (V2-V1).
Link Posted: 6/5/2008 5:09:03 PM EDT
[#4]

Quoted:
HOW IS GOOGLE NOT HELPFUL GO GET A DAMN DICTIONARY.





m-w.com
Link Posted: 6/5/2008 5:09:33 PM EDT
[#5]
Conduction is contact transfer of heat between two objects or through an object

Put a penny on the griddle, it gets hot from contact.  Heat the end of a copper wire.  The heat travels down the wire.  This too is conduction.  Copper is a good conductor, both thermal and electrical.  It works in the similar fashion.

Convection.  Hot air rises because it has lower density.  The heat rises in a room, making the ceiling hotter than the floor.  

Induction is the process where energy is transfered via magnetic fields which alternate.  In alternating, these magnetic/radio  fields induce electric currents in conductors.  The conductors will get warm from electrical resistance.

Putting a CD in the microwave will induce currents in the aluminzation.  These currents are more than the aluminum can handle and it will arc and spark until the surface is broken up to where no more induction is possible.
Link Posted: 6/5/2008 5:17:10 PM EDT
[#6]

Quoted:
Conduction is contact transfer of heat between two objects or through an object

Put a penny on the griddle, it gets hot from contact.  Heat the end of a copper wire.  The heat travels down the wire.  This too is conduction.  Copper is a good conductor, both thermal and electrical.  It works in the similar fashion.

Convection.  Hot air rises because it has lower density.  The heat rises in a room, making the ceiling hotter than the floor.  

Induction is the process where energy is transfered via magnetic fields which alternate.  In alternating, these magnetic/radio  fields induce electric currents in conductors.  The conductors will get warm from electrical resistance.

Putting a CD in the microwave will induce currents in the aluminzation.  These currents are more than the aluminum can handle and it will arc and spark until the surface is broken up to where no more induction is possible.


thank you very much. I appreciate your time.

thread over.
Close Join Our Mail List to Stay Up To Date! Win a FREE Membership!

Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!

You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.


By signing up you agree to our User Agreement. *Must have a registered ARFCOM account to win.
Top Top