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Sequences are generated by sampling a causal continuous-time signal u(t) (t≥ 0) at uniform intervals T. Write down an expression for uk, the general term of the sequence, and calculate the corresponding z transform when u(t) is
Shown is the cross section of an idler roller. Determine its mass moment of inertia and its radius of gyration with respect to the axis AA9.
The rotor of a turbine 13.6kg in mass is supported at the mid span of a shaft with bearings 0.4064m apart. The rotor is known to have an unbalance of 0.5kgcm. Determine the forces exerted on the bearings at a speed of 5000rpm if the diameter of the s..
Steam enters an adiabatic turbine steadily at 4.5 MPa and 450°C at a rate of 10 kg/s and exits at 450 kPa and 150°C. If the environment is at 100 kPa and 25°C, calculate the exergy of the steam at the inlet and the exit conditions.
A quantity of water within a piston-cylinder assembly executes a carnot power cycle. During ISOTHERMAL expansion, the water is heated from saturated liquid at 45 bar until it is a saturated vapor. The vapor then expands adiabatically to a pressure of..
Air is compressed by an adiabatic compressor from 95 kPa and 27°C to 600 kPa and 277°C. Assuming variable specific heats and neglecting the changes in kinetic and potential energies, determine (a) the isentropic efficiency of the compressor and (b) t..
Outdoor design conditions: modeling of weather conditions (temperature, wind speed, solar radiation) and convective heat transfer coefficient. Methods of using solar energy to air-conditiong
1. for a specific design the desired radial load was converted to the equivalent c10 load of 14.2 kn. if a 25 mm bore
consider a house with inside air temperature of 22 degc. one of the walls of the house has three single-pane glass
a ductile material has a yield strength of 280 mpa. determine the factors of safety corresponding to yielding for the
the water in a large lake is to be used to generate electricity by the installation of a hydraulic turbine-generator at
Estimate the density of the overflow and underflow streams and the density of the combined streams.
A mixture is composed of 3% air and 97% hydraulicfluid by volume. It llsa 20 cm3 container, and is initially at atmospheric pressure. The top of the container is compressed until the fluid pressure becomes 1 MPa absolute. The air adheres to the ideal..
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