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Consider the gas CF3CH2F with P=40.7bar and T=374k. If P=20.35bar and T=260k, is ideal gas behavior expected? If P=20.35bar and T=750k, is ideal gas beahavior expected?
Determine (a) the height h reached b the sphere after rebound (b) the constant k of the single spring equivalent to the given set if the maximum deflection of the plate is observed to be equal to 3h
When theta=2pi/3 , the angular velocity and angular acceleration of the circular plate are theta dot= 1.7 rad/sec. Determine the magnitude of the velocity of the rod AB at this instant.
Determine the vertical component of the average impulse force exerted by the ground on his foot. Give your answer in terms of the weight W of the athlete.
If it is subjected to two fields of force for which Fx=F0 and Fy=0.3F0, where F0 is constant, determine the equation of the path, and the speed of the electron at any time t.
The coefficient of kinetic friction is 0.35 between the wheels and the track. Determine (a) the time required to bring the train to a stop (b) the force in each coupling.
Assuming that the surface is maintained at the temperature of the water throughout the cooling, how long will it take for the temperature to 50C at a distance of 25 mm from the surface?
In order to increase heat transfer from this pipe by 200%, it is recommended to use integrally cast annular aluminum fins of height 10 mm and thickness 1 mm. Calculate the spacing of the fins.
Steam power plant operates on the reheat-regenerative Rankine Cycle with a closed feedwater heater. Find temperature of steam at the inlet of closed feedwater heater.
Determine the work produced by the turbine, the work consumed by the pumps, the heat rejected in the condenser for this cycle per unit of flow through the boiler.
The values of m and A are 4 and 5*10^-12, respectively (for change in stress in MPa and a in m), estimate the fatigue life of this plate.
During the power plant operation, water flows into the turbine at the rate of 75 m^3/sec and the generator operates at an average efficiency of 91%. Neglect any losses in the piping system. Evaluat
Estimate the maximum tensile stress to yield a fatigue life of 2.5*10^7 cycles. Assume the parameter Y has a value of 1.4, which is independent of crack length.
What is the maximum allowable hole diameter. Assume Y = 1.4. Note, given more than one choice of material data, choose conservatively.
Jack and Jill are involved in a friendly game which involves maximizing the distance (i.e. range) of their arrow shots. At what angle should Jack launch his arrow to maximize his range of shot?
If the angle is decreasing at a rare of .03 rad/min when the angle is 75 degrees, determine the speed v of the plane and the values of (r double dot) and (theta double dot) at this instant.
What is the shaft centerline temperature after exposure to the convective flow for 45 minutes? The convection heat transfer coefficient, h, is 80 W/m^2-K.
Saturated liquid exits the open feedwater heater at 1 MPa. Each turbine stage has an isentropic efficiency of 82%. Each pump has an isentropic efficiency of 100%. Determine the thermal efficiency.
Assume that there is one velocity head loss at the inlet and 0.5 velocity head loss at the outlet of the heat exchanger. The elevation difference is 10.5 m. Calculate the total pressure drop in the
The air mass flow rate is 0.5 kg/s. Air properties may be evaluated at 20o and 1 atm. Calculate the frictional pressure drop and the pumping power.
The spacing between the plates is 2 cm, and the mean velocity of the water is 3.5 m/s. Calculate the pressure drop per unit length in the hydrodynamically fully developed region.
What series of equal (uniform) payments is necessary to repay the following present amounts? $5,000 in 5 years at 15% compounded annually with annual payments?
Determine overall BTu's per hour to heat the steel from inside to out to bring the outer surface from the -20 to 32F and determine the required forced air temperature of heat source to achieve this.
Compute the bearing stress exerted by the legs on the floor if the total weight of the machine is 28,500 lb and the load is equally divided among the four legs.
The mass of the air in the cylinder is 0.5 lbm. Assuming that the air properties can be modeled using the ideal gas law, determine the work and heat transfer (both in Btu).