1. The problem statement, all variables and given/known data A shipyard worker drops a hot steel rivet (mass 125g, temperature 350 degrees C) into a river at temperature 5 degrees C, a distance 30m below. Stating any assumptions you make, calculate the entropy change of the universe as a result of this event. (specific heat capacity of steel ~0.4 J g-1 K-1). 2. Relevant equations 3. The attempt at a solution If anybody could tell me if I'm on the right lines at all or what the heck to do with the fact that the rivet's being dropped from 30m I'd greatly appreciate it. Thanks!