Thermal expansion by MARINA DAVILA https://padlet.com/mdavila/hxbngzltgerv Mª Alexandra Peña, Marina Davila , Luis F. Perez, Marco Alarcon en-us 2016-09-16 15:30:48 UTC 2026-02-05 14:12:25 UTC hello@padlet.com HOT AIR BALLOONS mdavila https://padlet.com/mdavila/hxbngzltgerv/wish/124391637
  • The hot air inside the balloon bag expands more quickly than the outside container therefore  it stretches the bag so that it expands and displaces the colder (heavier) air outside the bag.
    • ]]>     2016-09-16 15:40:54 UTC https://padlet.com/mdavila/hxbngzltgerv/wish/124391637     THERMOMETERS mdavila https://padlet.com/mdavila/hxbngzltgerv/wish/124393589
  • Most of the thermometers contain a liquid (usually alcohol or mercury) .This liquid is constrained to flow in  one direction only  (along the tube) due to changes in volume that are caused because of temperature change .
    • ]]>     2016-09-16 15:44:58 UTC https://padlet.com/mdavila/hxbngzltgerv/wish/124393589     FITTING OF PARTS mdavila https://padlet.com/mdavila/hxbngzltgerv/wish/124397026
  • A bushing can be fitted over a shaft by making its inner diameter slightly smaller than shaft’s  diameter .After then it is heated until it fits over the shaft and on cooling it makes a tight fit 
    • ]]>     2016-09-16 15:52:35 UTC https://padlet.com/mdavila/hxbngzltgerv/wish/124397026     THEORY https://padlet.com/mdavila/hxbngzltgerv/wish/124742694
  • Thermal expansion is the tendency of matter to change in shape, area, and volume in response to a change in temperature, through heat transfer.

  • The coefficient of thermal expansion is used:


    • in linear thermal expansion
    • in area thermal expansion
    • in volumetric thermal expansion


    • ]]>     2016-09-19 13:55:27 UTC https://padlet.com/mdavila/hxbngzltgerv/wish/124742694     JAR LIDS mdavila https://padlet.com/mdavila/hxbngzltgerv/wish/124749563
  • We often use to keep the metal lid of glass container . The reason behind it is that the high-temperature water causes the expansion of metal lid whereas Glass being a bad conductor of heated and also having a low coefficient of expansion remain unaffected .
    • ]]>     2016-09-19 14:05:50 UTC https://padlet.com/mdavila/hxbngzltgerv/wish/124749563     WATCHES & THERMOSTATS mdavila https://padlet.com/mdavila/hxbngzltgerv/wish/124751247 Due to ability of invar (An alloy of steel and nickel)to show exceptionally small expansion even when heated to high temperature it has many practical applications .For example, Invar is used in used in watches and thermostats.]]> 2016-09-19 14:09:12 UTC https://padlet.com/mdavila/hxbngzltgerv/wish/124751247 mdavila https://padlet.com/mdavila/hxbngzltgerv/wish/124756069 VIDEO]]> 2016-09-19 14:18:31 UTC https://padlet.com/mdavila/hxbngzltgerv/wish/124756069 EXERCISE  mdavila https://padlet.com/mdavila/hxbngzltgerv/wish/124764773 2016-09-19 14:36:31 UTC https://padlet.com/mdavila/hxbngzltgerv/wish/124764773