Q1. A 36.0 kg uniform beam is attached to a wall with the hinge while its far end is supported by a cable such that the beam is horizontal.
If the angle between the beam and the cable is q = 54.0° what is the tension in cable.
Q2. What is the maximum probable efficiency of the steam engine taking in heat at 100° C (373K) and dumping it at room temperature of about 20° C (293K)? (Efficiency is the ratio of work completed to heat input, or the ratio of temperature decrease to temperature input).