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Liquid water enters a valve at 300 kPa and exits at 275 kPa. As water flows through the valve, the change in its temperature, stray heat transfer with the surroundings and potential energy effects are negligible. Operation is at steady state. Modeling the water as incompressible with constant p = 1000 kg/m3, determine the change in kinetic energy per unit mass of water flowing through the valve, in kJ/kg.
a material is found to have a tenth-thickness of 2.3 cm for 1.25-mev gamma rays. a what is the linear attenuation
water vapor enters a turbine operating at steady state at 30 mpa 600 oc and expands adiabatically to 6 mpa. if the
Company wants to use a 100 m long steel cable to pull an airplane glider. If the glider has a mass of 1000 kg, and assuming the load is given by F=mg = 9800 N, and if the Young’s modulus of steel is 200 GPa (200,000,000,000 Pa), and Poisson’s ratio i..
an ideal gas contained in s piston-cylinder device undergoes and isothermal compression process which begins with an
a piston cyfinder system containing 0. 5kg of air is compressed from a volume of 0. 35 m3 to a volume of 0. 1 m3. if
The data listed below are claimed for power cycles operating between hot and cold reservoirs at 1000 K and 400 K, respectively. For each case determine whether such a cycle is in keeping with the first and second laws of thermodynamics.
a periodic torque with a maximum value of 1.0 n-m at a frequency of 5.0 rads is applied to a flywheel suspended from a
a car drives over the top of a hill that has a radius of curvature of 100 ft. if the normal component of acceleration
There is a membrane made of an isotropic material whose elastic modulus and Poisson's ratio is E and v, respectively. When this membrane is elongated along x-direction with no lateral deformation in y-direction, the apparent elastic modulus (E') dete..
A commercial heat pump has energy in to the system at a rate of 60 kW from a thermal reservoir. If the power input from an electric motor is 15 kW, (a) determine the power (kW) delivered to the office area. (b) Determine the coefficient of perform..
a rocket launches an unpowered space capsule at point a with an absolute velocity va 8560 mihr at an altitude of 27
a fenced enclosure consists of a rectangle of length l and width 2r and a semicircle of radius r as shown in figure
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