The ends of a to two fixed points a, b in the same vertical line, b being depth 2a below a. threaded on the string is a small smooth ring r of mass m. the ring revolves with uniform speed in a horizontal circle with b as centre, the string remain- ing taut. show that br and the uniform speed of the ring light inelastic string, of length 3a, are attached at a 5a/6. find the tension in the string

Asteam power plant operates on an ideal reheat rankine cycle between the pressure limits of 15 mpa and 10 kpa. the mass flow rate of steam through the cycle is 12 kg/s. steam enters both stages of the turbine at 500°c. if the moisture content of the steam at the exit of the low-pressure turbine is not to exceed 10 percent, determine (a) the pressure at which reheating takes place, (b) the total rate of heat input in the boiler, and (c) the thermal efficiency of the cycle. also, show the cycle on a t-s diagram with respect to the saturation lines. (2.15 mpa; 45.0 mw; 42.6%)

"an open tank has the shape of a right circular cone. the tank is 6 feet across the top and 5 feet high. how much work is done in emptying the tank by pumping the water over the top edge? note: the density of water is 62.4 lbs per cubic foot."

Determine the maximum r-value of the polar equation r =3+3 cos 0