The street-lights at A and B are suspended from the two poles as shown. If each light has a weight of 50 lb, determine the tension in each of the three supporting cables and the required height h of the pole DE so that cable AB is horizontal. D A h B C E 24 ft 18 ft 6 ft 10 ft 5 ft Prob. 328

Thermodynamics I Lecture notes System: the object/ volume Closed system- A fixed quantity of matter. Control Volume- A fixed volume of space. Isolated System- Nothing crosses boundary. Property- A macroscopic quantity that can be assigned a value at...