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A turbine is connected to an electric generator through gears, as shown in Fig. 5.59. The mass moments of inertia of the turbine, generator, gear 1, and gear 2 are given, respectively, by 3000, 2000, 500, and 1000 kg-m2 Shafts 1 and 2 are made of steel and have diameters 30 cm and 10 cm and lengths 2 cm and 1.0 m, respectively. Find the natural frequencies of the system.
a block having a mass of 0.8 kg is suspended from a spring having a stiffness of 120 nm. if the dashpot provides a
Determine the ratio ß defining the areas that should be removed in order to obtain the strongest cross section in bending.
A thin long electric heater of width 20 cm is placed with its width oriented vertically. It dissipates heat by free convection from both sides of its surface into air at 20C. If the heater should not exceed 225C, determine the length of the heater in..
determine the power needed to drive the low speed turbine given maximum velocity in the test section 140 mih with 12 x
Additional cold ethyl alcohol is poured onto the water's surface until the top surface of the alcohol coincides with the top surface of the ice cube (in hydrostatic equilibrium). How thick is the required layer of ethyl alcohol?
a river has a steady speed of 0.461 ms. a student swims upstream a distance of 1.00 km and swims back to the starting
consider a magnet moving in a coil of n turns. this system can be modelled as mass spring damper system. the damping
air cools an electronics compartment by entering at 60 f and leaving at 105 f. the pressure is essentially constant at
How is the technology utilized effectively or ineffectively? What are some barriers to more effective usage, and what are some recommendations you would make to overcome these barriers?
In a lecture demonstration, a professor pulls apart two hemispherical steel shells (diameter D) with ease using their attached handles. She then places them together, pumps out the air to an absolute pressure of p, and hands them to a bodybuilder ..
refrigerant 134a enters the compressor of a refrigeration system as saturated vapor at 0.14mpa and leaves at
a mass of 5kg of saturated liquid-vapor mixture of water is contained in a piston-cylinder device at 100 kpa. initially
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