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Two of the three velocity components for an incompressible flow are: u = x^2 +2xz, v=y^2+2 yz What is the general form of the velocity component w(x,y,z) that satisfies the continuity equation?
Estimate the amount of torque needed to actuate the knee near 0 deg flexion (standing position) based on the friction in the knee joint for a person of (a) 50Kg, (b) 75Kg, (c) 100Kg.
The power plant claims a planned efficiency of 34.90% for its new power plant design. Based on this information, what is the maximum power that the power plant can output without endangering the riv
The 2.00 moles of gas go from having an initial volume of 208.8 cm3 to 129.8 cm3. If 1.750 × 103 cal are released by the gas during this process, what are the temperature T of the gas and the
Plastics and other polymeric materials are expensive with respect to steel, and are usually more costly than aluminum, but have largely replaced both in many applications.
Determine the cycle thermal efficiency for the internally reversible cycle. Determine the cycle thermal efficiency for the cycle when the compressor and turbine isentropic efficiency are 0.9.
Calculate: (a) stroke length. (cm) (b) average piston speed. (m/sec) (c) clearance volume of one cylinder. (cm^3) (d) air flow rate into engine. (kg/sec)
What is the minimum number of years you must wait to double your balance? Suppose instead that you deposit the $10,000 in another saving account that earns 7%interest compounded yearly.
Calculate the minimum possible magnitude u of the muzzle velocity which a projectile must have when fired from point A to reach a target B on the same horizontal plane 12 km away.
Determine the exit temperature and the power input assuming that the air is (a) an ideal gas with constant specific heats and (b) an ideal gas with variable specific heats.
Calculate the force and pressure acting across the pelvis and at the feet of a 150 lbm person. Model the body using cylinders. Neglect external pressures (such as air pressure).
What will the temperature of the R134a be when the piston just lifts off the stops? B.) What is the final temperature of the refrigerant? C.) What is the total change in internal energy of the refri
Derive an equation for the work of a mechanically reversible, isothermal compression of 1 mole of a gas from an initial pressure p1 to a final pressure p2 when the equation of state is the virial ex
What fractional change in (absolute) temperature (from 20.C) would be required to cause the density of water at 50.bar to be the same as its density at 1 bar and 20 C.
Calculate the number of vacancies at 546°C given that the energy for vacancy formation is 1.15 eV/atom; assume that the density at both temperatures is the same.
Compute the torsional shear stress in a hallow shaft with an outside diameter of 40 mm and an inside diameter of 30 mm when transmitting 28 kilowatts (kW) of power at a speed of 45 rad/s.
The ball at is kicked such that = 60 . If it strikes the ground at having coordinates = 25 , -25 , determine the speed at which it is kicked. Determine the speed at which it strikes the ground.
The earth has an absolute surface value ofgof 9.825 m/s2 and has a radius of 6371 km. Determine the radius of curvature of the orbit at A.
After load P is applied, joint B moves to the coordinate position (0.40 in., -0.60 in.). Assume a = 7 ft, b = 4 ft, and h = 5 ft. Determine the normal strain in each bar.
The collector transfers heat by natural convection to the air with a heat transfer coefficient of 3.2 Btu/h.ft^2.°F and also transfers heat by radiation to the sky. Calculate the total heat loss
Determine the horizontal distance between the launching ramp and the point of landing. (C) determine the maximum height he attains.
But its engine failed at the moment the rocket has reached an altitude of h=300ft and a speed of 550 ft/s. determine the maximum height from the ground level that the rocket can reach?
Determine the work and heat transfer, per unit mass, each in kJ/kg, for the refrigerant. Neglect changes in kinetic and potential energies.
Compute the steady-state concentration of benzene in the room b)Assuming the air in the room is initially free of benzene, compute the time necessary for benzene to reach 95 percent of the steady-st
When the clay is removed, it is at 500oC and it is left to cool on a rack in the 20oC room (h = 5 W/m2oC). What is the rate of convection heat transfer from the clay to the room? (c) What is the hea