Steam enters an adiabatic turbine steadily at 10 mpa, 500° celcius and leaves at 900 kpa. if the power output is 6 mw and the isentropic efficiency is 70 percent. determine: the mass flow rate of steam through the turbine, the temperature at the turbine exit, and the rate of change of entropy.

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

What precautions should you take to prevent injuries when dealing with heavy loads?

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?