I may write a bit rubbish English since it's not my native language but please ask if something sounds wrong or hard to understand. 1. The problem statement, all variables and given/known data The inner diameter of an iron cylinder is 80,00 mm (millimeter) and the inner diameter of an aluminium cylinder located inside this iron cylinder is 79,80 mm. The temperature is 20*C. In which temperature the aluminium cylinder jams to the iron cylinder? I have tried to solve this multiple times yet never succeeded. How should I proceed? 2. Relevant equations I'm pretty confident this'd be solved by the expanding of volume V=V0(1+[tex]\gamma[/tex][tex]\Delta[/tex]V) 3. The attempt at a solution Haven't had any potential attempts so I'll leave this blank.