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What is the change of internal energy and enthalpy of 4 kg nitrogen as it changes from 50oC and 100kPa to 100oC and 200kPa? Does the pressure at the beginning and end of this process have any effect on the results?
air is contained in a vertical cylinder fitted with a frictionless piston and a set of stops. the atmospheric pressure
the velocity of a lift increases uniformly from zero to its maximum value at mid-height (1.4m) in 7.5s and then decreases uniformly to zero in 7.5s. The peak power output is 6kW when the velocity is maximum, determine the maximum lift force provid..
for a first order system with a transfer function of 15s2 given a unit step input pleasea. derive the transfer function
two carnot heat engines are operating in series such that the heat sink of the first engine serves as the heat source
calculate the critical crack tip radius for a ceramic material that has a flexural strength of 638 mpa an elastic
A linear isotropic material has the shear modulus of elasticity G of 11.5*10^6 psi and the Poisson's constant v of 0.3.
the diameter of the hollow core of a solid propellant grain remains axially uniform during burning. its length is 5 m
a engineer designs a heat engine using flat-plate solar collectors. the collectors deliver aeat at 70 degrees c and
a closed rigid container contains water at 100 degrees celcius 70 quality. the volume of the container is 0.2m3. the
Calculate the head provided by the pump and Calculate the brake power required if the pump efficiency is 75% (kW).
calculate the speed of an iceberg driven by wind on its exposed not submerged surface. model the iceberg as a cylinder
a hair dryer is basically a duct of constant diameter in which a few layers of electric resistors are placed. a small
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