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A common trick for opening a stubborn lid on a jar is to run very hot water over the lid for a short time. This is because the coefficient of expansion for glass is less than that for steel. Glass expands less than steel when heated. This makes it easier to open the lid. Is this true or false

Respuesta :

Answer:

Glass expands less than steel when heated.  This is because of the coefficient of expansion.  The statement is true.

Explanation:

Thermal expansion refers to:

  • Expansion of the size of an object, when heat is provided to that object, is called as thermal expansion basically it is expansion due to heat

Coefficient of thermal expansion:

  • (CTE) refers to the rate at which a material expands with increase in temperature.

given that lid on the jar is made up of steel.

so when we very hot water run over the lid for short time, The metal lid expands but the glass jar. which forms a gap between the metal lid and the glass jar.

Coefficient of thermal expansion of ordinary glass is 8.6×10^-6/°

Coefficient of thermal expansion of steel is 13×10^-6/°

we can say that  

Steel having higher coefficient of expansion will expand more as compared to the glass.

Hence the statement is True.

learn more about coefficient of expansion here:

https://brainly.com/question/8942923

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