When it is completed in 2002, the International Financial Center in Taipei, Taiwan, will be the tallest building in the world. The International Financial Center will also have the fastest elevators in the world. Two of the 63 elevators will travel from the ground floor to the eightyninth floor in just 39 s. Suppose the power output of each elevator motor is 158 kW. How much work will these motors do in lifting the elevator to the eighty-ninth floor?

Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?

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%)

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