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Spherical balloon has a diameter D1 when the pressure of the gas inside is P1 and atmospheric pressure is Po. The gas is heated, causing the balloon diameter to increase to D2. The pressure of the gas is proportional to the balloon diameter. How much work is done by the gas? How much work is done on the atmosphere? Express the answer in term of P1, V1 and V2.
steam turbine expands steam reversibly and adiabatically from 4Mpa,300C to 50C turbine exit. determine the work per kg of steam.
a fully loaded lorry has a mass of 10 tonnes and is travelling along a road at uniform velocity when the brakes are applied and the lorry is brought to rest. if the deceleration is 2m/s2 and the coefficient of rolling friction is 0.15, determine t..
A fireclay brick cube, 10 cm in length is removed from a furnace where it was maintained at a temperature of 500 degrees C. The brick cube is then placed in ambient temperature conditions.
Determine the maximum horizontal displacement s of the block. Each of the two springs has a stiffness of k = 2500N/m and an unstretched length of 0.15 m.
Assuming the pulley is a uniform disk with a mass of 0.31 {rm kg}, find the speed of the block after it has fallen through a height of 0.50 {rm m}.
Design a flat roof meeting certain mechanical performance criteria. The basic structure of the roof is a series of rectangular-section 'joists', made from softwood, that span the space to be covered by the roof.
Carbon dioxide enters an adiabatic compressor at 100kPa and 300K at a rate of 0.5kg/s and exits at 600kPa and 450K. Considering constant specific heat, determine (a) isentropic efficiency of the compressor (b) the rate of entropy change in (kW/K) ..
the load on a 2 inch diameter hydraulic cylinder increases from 10000lb to 15000lb. due to compressibility of oil the
a vertical piston-cylinder device initially contains 0.25 m3 of air at 600 kpa andnbsp300degc. a valve connected to the
an fcc iron-carbon alloy initially containing 0.20 wt c is carburized at an elevated temperature and in an atmosphere
What are the possible outcomes of this scenario?
Steam @ 10 MPa, 600 degrees celcius enters the first-stage turbine of an ideal Rankine cycle with reheat. The steam leaving the reheat section of the steam generator is @ 500 degrees celcius
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