Hi guys ,I need help to find the radius of curvature for this exercice: A metal bar is 1.75m long with a coefficient of thermal expansion of 1.34*10-5K-1. It is rigidly held between two fixed beams. When the temperature rises, the metal bar takes on the shape of the arc of a circle. What is the radius of curvature of the circle when the temperature rises by 40 degrees celcius? hint:for small angle: sin(x)=x-x3/6. thankx for your help!