Question

Can anyone explain the underlined statement to me?

Answer 1

⭐️ ⭐️ ⭐️ ⭐️ LOGIC ⭐️ ⭐️ ⭐️ ⭐️

◆ WHAT IS THERMAL EXPANSION ?

ANS. - Thermal expansion is the expansion in length or volume or area of a substance on heating. Length expansion is called as linear expansion ; Volume expansion is called as cubical expansion and Area expansion is called as superficial expansion.

◆ COEFFICIENT OF THERMAL EXPANSION ?

ANS - In a specific material, when the degree of expansion is divided by the degree of change in temperature at constant pressure, then it is called coefficient of thermal expansion.


$<marquee> ⭐️ WHY THE PRESSURE HAVE TO BE KEPT CONSTANT </marquee>$

Ans - Pressure have an effect on temperature. If pressure increases or decreases, the temperature can increases or decreases correspondingly. So, pressure have to be kept constant.

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