Sunday, July 8, 2018

thermodynamics - Where does the kinetic energy go?


A uniform cylinder was placed on a frictionless bearing and set to rotate about its vertical axis. After a cylinder has reached a specific state of rotation it is heated without any mechanical support from temperature $T$ to $T+\Delta T$. Angular momentum will be conserved but rotational kinetic energy will decrease as angular velocity decreases. What I fail to understand is where does this energy go?




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