Determine the horsepower input for a motor
Determine the horsepower input for a motor necessary to lift a 200 kg box at a constant rate of 2 m/s. The overall efficiency of the system is 0.8.
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A spherical capacitor is comprised of a solid inner conduction sphere of radius a with positive charge Q and an isolated, concentric, thin outer conduction shell of radius b and charge -Q. Derive the capacitance expression for this arrangement. Wh
What is the temperature at the exit of the valve in oC? what is the internal energy (kJ/kg) of the refrigerant at the exit of the valve?
A steam turbine produces 3000 hp with a mass flow rate of 22,000 pounds per hour. The steam enters at 1100 °F and 900 psi and exits at 2.5 psi.
The power per unit area reaching Earth from the sun at the top of the atmosphere at the equator is 1.36 x 10^3 W/m^2, which is called the "solar constant". assuming that the earth radiates like a blackbody at uniform temperature, what do you conc
The 50-mm radius pulley A of the clothes dryer rotates with an angular acceleration of alpha = 24*(theta)^(1/2) rad/s^2, where theta is in radians. Determine its angular acceleration when t = 2s, starting from rest.
Liquid water at 453 K and 1002 kPa has an internal energy of 762 kJ/kg and a density of 890 kg/m3. (a) What is the enthalpy (per weight and per volume)?
The yield stress of a tension specimen machined from a 0.5 m wide by 0.6 cm thick copper sheet is 145 MPa. The sheet is rolled further in the plane of the sheet with an applied tensile force of 0.22 MN.
Consider a large vessel divided into two chambers by a dividing nwall, such as that described in lecture on 23 Feb. The vessel and its contents are at 298 K and the dividing wall is 0.001 m thick rubber.
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