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A body with a mass of 20kg accelerates uniformly in a straight line according to the law, v=10-2t, where v is the final velocity after t in seconds.
How do the pressure and the number of molecules inside the bubble scale with the radius R of the bubble? Assume the surface tension \gamma is known and you can model the bubble/air as an ideal gas.
Find the variation of vapor temperature and phase interface position with time. assume that the liduid ahead of the interface remains at Tsat and neglect convective motion.
Draw and label a flow chart of the process, giving the temperature and specific enthalpy of each stream and tell at what rate must steam be fed to the 1st effect?
The diameter of the rod is 25mm internal diameter and its thermal conductivity is W/moC. Calculate the heat transfer coefficient at the surface of the rod and also heat transfer rate.
The turbine is located 75 m below the water surface. If the water level in the reservoir is held contant, what is the maximum power available to produce electricity?
What torque must be applied to the shaft to overcome the fluid shear stress to maintain this rotational speed? What power (in W) would be required to maintain this speed?
Determine the value of heat flux that must be supplied by the strip heater so that all heat generated within the wall is transferred to the inside of the chamber.
The acceleration of a particle is given by a = -ks2, where a is in meters per second squared, k is a constant, and s is in meters. Determine the velocity of the particle as a function of its positio
Acompressed spring above the piston exerts a force of 60 N on the piston. If the atmospheric pressure is 95 kPa, determine the pressure inside the cylinder.
Saturated water vapor at 400? is heated at constant pressure until its volume has doubled. Determine the final temperature using the ideal gas equation of state, the compressibility charts, and the
Determine L , in cm, if the manometer liquiud is mercury with a density of 13.59 g/cm^3 and the gas pressure is 1.3 bar. A barometer indicates the local atmospheric pressure is 750 mmHg.
What are the inner and outer surface temperatures of 3-mm-thick window glass, if the outside ambient air temperature is -20 and the associated convection coefficient is 76 W/m2*K?
How do you find the magnitude of individual vectors when you have the magnitude of the resultant vector. After finding the i and j values of each vector and you have xa + xb = 180N.
A person weighing 800 lbf climbs a flight of stairs that extends a vertical distance of 300ft. Calculate the work and power required for this process if it requires 3 min, 5 min, and 10 min.
Sketch and name the particular type of backwater curve occurring in this case. Estimate the distance along the channel over which the fluid depth changes from 0.4m to 0.2
A hydraulic jump forms in a horizontal trapezoidal channel. The base width is 4m and the side slopes are 45 degrees. Determine the energy dissipated in the jump.
Estimate the force on the chimney and the bending moment at the bottom of the chimney. You may assume that the effect of the wind on the first 1 m height of the chimney has a negligible effect on th
Determine the rotor diameter and the nozzle angle if the vane width is 12.7 mm, clearly indicating the assumptions made. For the gas assume, Cp= 1.13 kJ/kgC and sp. Heat ratio = 1.33.
Develop a relation between dP/dx, U1 and U2 that ensures that the net volume flowrate between the two plates is zero. Determine the magnitude and direction of the shear stress acting on the upper plat
Determine the static head efficiency required of the turbine if the total pressure of its exhaust is not to be less than 1.6 bar and the exhaust velcotiy is 300 m/s.
Determine for this machine the slip factor, isentropic efficiency and the Mach number at the diffuser inlet, stating your assumptions. For air Cp=1.0 kJ/kg.K and sp. Heat ratio = 1.4.
Consider a nuclear power plant that produces 1000mw of power and has a conversion efficiency of 30% Determine the amount of nuclear fuel comsumed by this plant in one year.