Equation [3], conservation of momentum, is used to find the initial velocity of the ball, Vb. The velocity of the pendulum-ball, Vf, is taken from the velocity v found in question 1 . The pendulum, mp, is initially at rest, and mb is the mass of the ball. Using equation [3], determine an equation to solve for the velocity of the ball, Vb, in terms of mb, m and Vf

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.