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An electric motor, of mass m = 100 kg and operating speed = 1800 rpm is fixed at the middle of a clamped-clamped steel beam of rectangular cross section, as shown in Fig. 12.32. Design the beam such that the natural frequency of the system exceeds the operating speed of the motor.
Air enters the turbine of a gas turbine at 1200 kPa and 1200 K, and expands to two stages. Between the stages, the air is reheated at a constant pressure of 350 kPa to 1200 K. The expansion through each turbine stage is isentropic.
During the process, the pressure and specific volume are related by pv = constant. For the refrigerant, determine the work and heat transfer per unit mass, each in KJ/kg.
A circular plate having a diameter of 300 mm is held perpendicular to an axisymmetric horizontal jet of air having a velocity of 40 m/s and a diameter of 80 mm as shown in Fig. 5-1.
calculate the total equivalent length of 1-in wrought iron pipe that would produce a pressure drop of 70 kpa due to
describe the principle of operation for watts flyball governor. include the relevant block diagram and indicate the
A manometer is used to measure the air pressure in a tank. The fluid used has a specific gravity of 1.25, and the differential height between the two arms of the manometer is 28 in. If the local atmospheric pressure is 12.7 psia, determine the abs..
What are the percentages of the total heat absorption taking place in the economizer, boiler drum and the superheater, respectively? Assume cp of air and water as 1.005 kJ/kg K and 4.2 kJ/kg K, respectively.
Based on the average, logarithmic energy loss per collision, approximately how many collisions must a neutron make with Fe-56 to slow from an energy of 1 MeV to 1 eV?
Ten kilograms of water at 15° C and 700 kPa are contained in a cylinder as shown. Heat is transferred slowly causing the piston to rise. Determine the heat transfer and work done if the final condition is saturated vapor. Show the process on a T-v di..
question 1 give examples from your own experience of situations where friction is a desirable and b
1. work at a rate of 25 kw is done by a paddle wheel on a slurry contained within a closed rigid tank. heat transfer
consider the spring mass system shown in figure 1. the block with mass 4m slides on a smooth frictionless surface and
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