Question

explain the expansion of cavity in metals in terms of 'application of thermal expansion'

Answer 1

$$\begin{gathered} Dearstudent, \\ Fortheexpansionofcavityinmetalpressureisonefactorcau\sin gexpansionwhilethethermalpropertiesofthematerialareanotherfactor. \\ Mathematically \\ \frac{∆D}{D}=\alpha ∆T \\ ∆D=Changeindiameterofcavity(sphericalcavity) \\ D=Initialdiameterofsphere \\ \alpha =coefficientoflinearthermalexpansion \\ ∆T=changeintemperature \\ Duetotheabovementionedrelationthecavityexpands \\ Regards \end{gathered}$$