What is the maximum possible efficiency of a steam engine that uses steam at a temperature of 100°C on a day when the temperature is 300K? (round off the answer to the nearest whole number?
A non-uniform beam of weight 50 N is 2 m long and is supported on a pivot situated in the exact middle of the beam. The centre of gravity of the beam is 0.5 m ot the right of the point where the pivot touches the beam. What weight has to be added to the left side of the beam so that the beam stays perfectly balanced (in equilibrium)?