The angle between the rod and the string at B is 50°. The rod has length 1.2m and weight 8.5 N. An object O of mass M is hung from the rod at B. The tension T in the
string is 30N
(i) Use the resolution of forces to calculate the vertical component of T.

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.