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If he sits up and raises his feet just as he crosses the vertical line, so that his center of gravity is 9 feet from point A, what angle with the vertical will the swing make when the swing reaches
The speed limit on a country road is 70 km/hr. The radius of curvature for a bridge on the road is 50 meters. Was the ticket deserved? Show why or why not.
A freezer is 1 m wide and deep, and 2 m high, and must operate at -10 degree C when the ambient air is at 30degree C. What thickness of polysterene is required if the load on the refrigeration unit
Determine (a) the mass flow rate of condensate, in lb/min. (b) the rate of heat transfer, in Btu/min. (c) the rate of entropy production, in Btu/R - min. (d) the rate of exergy destruction, in Btu/m
A single mixed stream exits at 1 bar. cp,i for air and helium is 1.005 and 5.193 kJ/kg.K, respectively. Ignoring kinetic and potential energy effects and heat transfer and external work, determine f
Knowing that the allowable maximum shearing stress in shaft AE is 9000 psi, determine the smallest permissible diameter of shaft AE.
Write a user-defined function that calculates grade point average (GPA) on a scale of 0 to 4, where A=4 B=3 C=2 D=1 E=0 and. For the function name and arguments use av = GPA(g,h).
If the material modulus values are E=220 kN/mm2 and G=90 kN/mm2, estimate the extension in section dimensions due to the load in the axial direction.
If the applied force P=2000lbs determine the maximum horizontal deflection of the bottom of the beam and the maximum normal stress in the beam.
What is the mass transfer rate on both the top and bottom surfaces(kg/s). Are they equal and why? Estimate how long it will take for the oil to disperse from the surfaces given the initial oil layer i
Perform a complete analysis of the cycle to determine the properties at each state point, the heat transfer and work of each process, and the net work and thermal efficiency.
Analyze the cycle using air standard assumptions that account for variation in specific heats. Determine the mass flow rate of air required to produce 60 MW.
When the total water volume is 0.2m3, the pressure is 1MPa. Heat is now added to the water at a rate of 5kw until the total water volume is 0.2m3. What is the final temperature of the water?
You are to select a refrigerator for frozen food processing facility. The freezing of the food requires a heat rate of 250kw at a temperature of -20C. you will reject heat to the atmosphere whose te
Assume the mouth of the container is narrow enough that in effect w have a 1 inch stagnant gas. Will the alcohol content of the solution change significantly in 1 day (Diffusivity for this system i
Estimate the safety factor with respect to infinite fatigue life for (a) a torque fluctuating between 0 and 60 lb.ft, (b) a completely reversed torque of 30 lb.ft.
Determine the friction force F and the acceleration of the center of mass. Model the wheel as a thin circular disk.
Calculate the value of mass transfer coefficient and the flux for mass transfer from a sphere of naphthalene to air at 45C and 1 atm abs flowing at a velocity of 0.305 m/s.
Construct the radial hardness profiles to scale for the following a 50-mm (2-in) diameter cylindrical specimen of an 4340 steel alloy that has been quenched in moderately agitated oil.
A permanent magnet DC motor is coupled to a load through a gearbox. If the polar moments of inertia of the rotor and load. What is the max acceleration that the motor can produce in the load?
The coefficient of restitution is e=0.7 between the block and the sphere. Determine after impact:(a) the velocities of A and B, and (b) the distance x traveled by block B.
Determine the average force on the wall in lbs. The deceleration rate in ft/s2, and the time period of decceleration in seconds.
Knowing that the coefficient of friction is uk=0.3, determine how far the package will travel own the ramp in 5 seconds.
What are the mole and mass fraction of water at the air side of the interface? At the water side of the interface?
The cylinder and hub have a total mass of 30 kg and a radius of gyration of 0.5 m. Assume no slippage. Determine the acceleration of the mass center of the cylinder and hub when P= 90 N.