banner5 Link to go to Sensei site
    HomeSubscribeMy AccountFAQcontact ust Japanese JLPT N5UGC NET SET paper IMathematicsPhysics -  Heat, Light, atomic, General Chemistry - Physical,Analytical, Organic, Inorganic ChemistryBiology - Botany, Zoology, Microbiology,ImmunologyHuman Body system : Circulatory, Peripheral,Nervous,Mascular, sexual t Login | Register
>>
            
   Science >> Physics >> Phy-Heat >> Application

Go to item :

Login or Register   Heat -Effects-Thermal Expansion  

   New User Register


   Login Member:
Email:
Password:


   Site Search
b
   Advance Search
 
Other animations
b
Heat - Bi-metallic strip- thermostat
Translate This Page
 

Science and tech animation catalog in flash Animation product List
b
    education animation online in flash Row view of animated science  Row format
    physics, chemistry, biology animation Grid format of education animation  Grid format
    educational animation link  List format of educational animation  List format



 


 
Overview         (For age - group : Below 16 )

This animated school science about thermal expansion explains how metals undergo thermal expansion when heated, this has found application in planning for bridges, overhead wire, railway tracks and home applications. The animation contains linear, superficial and volumetric expansion.

Product - Animation
  Size/Duration Subscribe Preview / Trailer
Size (KB) 370 US$    1.50 Rs.118.50
 Check price in your currency
Subscription Days = 30 Watch a preview (opens in separate window)
Duration (hr:min:sec) 0:14:0
Add To Cartshopping cart
Watch a free preview of this science  and technology animation
                                                                    

Effects of thermal expansion - animation contains the following :

Why space is provided between rails and bridges ?
Why telegraph & electrical lines are never hung tautly between poles ?
Why a tight glass stopper or a metal screw cap can be opened by heating them ?
Why one end of a steel bridge is not fixed in concrete ?
Why glassware used in kitchen are not made up of thin glasses ?

Explanatory Notes section elaborates on the following :

  • What is thermal expansion ?
  • Why heating leads to thermal expansion ?
  • Does thermal expansion occurs in liquid also ?Does the thermal takes place in gases also ?

Snapshots         
thermal expansion - electrical wires are not hung tautly
thermal expansion - gaps are provided between rails
Thermal expansion example 1 - electrical wires are not hung tautly
Thermal expansion example 2 - gaps are provided between rails for expansion
thermal expansion - why one end of a steel bridge is not fixed
Thermal expansion example 4 - glassware are made up of thin glasses
Thermal expansion example 3 - one end of a steel bridge is not fixed to provide for expansion
Thermal expansion example 4 - glassware are made up of thin glasses
Details of the animation/ movie /software

Most substances expand when heated and contract when cooled.
The change in length / area or volume (due to contracting/expanding) is directly related to temperature change. Every linear dimension increases by the same percentage with a change in temperature

Not all materials contract/expand at the same rate; the amount of contraction/expansion varies depending on the material. The coefficient of linear expansion, is a proportionality constant that determines the rate of change in length in different materials when they are heated and cooled.

Applications :
In thermometers, thermal expansion is used for measurement. Liquid expand more than solids. Stained red ethanol has a relatively large coefficient of cubic expansion than glass . Temperature can be measured as it rises through the capillary faster.

-If a lid of a glass jar is tight, holding it under hot water for a short time will make it easier to open. This is because the lid will be struck by the hot water more directly than the glass, and so it will expand sooner. Furthermore, metals generally expand more than glass for the same temperature change.

Problems:

- If steel bridge expand or contract, it can cause structural damage.
However, steel bridges are often mounted on rollers to prevent this problem.

-Expansion gaps also exist in train tracks.

-Water and steam pipes often have a U-bend in them to allow for thermal expansion.

Related Products
 
Buyers Feedback:



Give your comments
  Give your Comments
Name *
Email *
Comment*
Enter Code
Code Image - Please contact webmaster if you have problems seeing this image code  Refresh
 

 
Home | Subscribe| My Account |FAQ |About Us | Contact Us | Login | Register
Copyright ©2022 Goalfinder.com All rights reserved. Copyright | License | Privacy policy|