THERMAL EXPANSION - Detailed Explanations & Calculations

Thermal expansion is a physical phenomenon where substances expand in response to an increase in temperature, causing their particles to vibrate more vigorously and take up more space.

This leads to an increase in the material's volume and can be described through coefficients of linear, area, or volumetric expansion, which quantify the change in size per unit change in temperature.

[innovateandelevate]

Please can you complete solving number 3, I'm not getting the same answer

[Iuuh]

Sir please I actually understand all the calculations on this but not the ones where radius is given
Like some questions where radius is part of the question in some text book they use πr square but some they don't use it

[GregWhitney-rvts]

Sir am I suppose to convert the degree Celsius to kelvin ?

For my answers they are totally different and for my number two it very confusing

[PrincessUzornna]

Pls complete your solutions because we can get different answers from you sir