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The loading produes a gross nominal tension stress of 45 MPa perpendicular to the plane of the crack tip. Calculate the stress intensity factor at the crack tip.
Two 10 inch gears are to be mounted 12 inches apart and have a velocity ratio of 5:1. Find the pitch diameters and the number of teeth on both gears.
The liquid condensate is removed from the system at 60o F. The air is then reheated until a final state of 80 oF and 40% relative humidity is reached. Determine the mass flow rate of the condensate
Determine (a) the maximum temperatureand pressure that occur during the cycle, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle.
The density of liquid oxygen at 95 K is around 500 kg/m3. If the emissivity is increased to 0.9, do you think the evaporation rate will decrease or increase?
The power output of the heat engine is 180 kW. Determine the reversible power and the irreversibility rate for this process.
Calculate stoichiometric A/F ratiop of benzene (c6H6). in an actual combustion of benzene the air'fule ratio was 12/1. calculate the analysis of the wet products of combustion.
Hydrogen at 25 bar, 450°C enters an adiabatic turbine and expands to 2 bar, 160°C with a mass flow rate of 0.2 kg/s. For a dead state of To= 25°C, Po = 1 atm.
Determine the (a) work in kJ, (b) the change in exergy of the air in kJ, and (c) the amount of exergy destroyed, in kJ. Kinetic and potential energy effects can be ignored and the dead state is To=
For the diffuser shown in the attached image, Find the mass flow rate and the average velocity of the air at the exit of the diffuser. For air, let density = 1.194 kg/m^3.
How many people in the U.S. might be expected to die each year as a result of cancer caused by natural background radiation (excluding radon lung exposures)?
Determine the reduction in heat loss per unit length after encasing the smaller cylinder within the larger cylinder and the corresponding surface temperature of the large cylinder.
Determine how much force will be required to stretch them the required amount and how much deflection is required. There are 10 rods, each is 0.75 in in diameter and 30 ft long.
Derive a relationship between partial molar excess enthalpy, activity coefficient of species i and temperature. Assume partial molar excess enthalpy is indepedent of temperature.
The air is now compressed to V2 volume in such a way that the temperature inside the cylinder remains constant. Determine the work done during this process if air follows the ideal gas law relation
A thermometer placed in the tank indicates that the air temperature at the final state is 77 degrees C. Determine a) the mass of air that has entered the tank and b) the amount of heat transfer.
Determine the velocity of each block just after collision and the distance between the blocks when they stop sliding. The coefficient of kinetic friction between blocks and the plane is uk=.3
For mating hinges on the sign, specify the class of fit, the limits of size, and the limits of clearance. Use the basic hole method. Also, explain the difference if you were asked to use the basic s
Find the desired radius and mass of the absorber if the absorber is to not exceed an angular deflection amplitude of 30 degrees when the engine is running at 750 rpm.
If the initial value of N is 1 million/L, what values of k would allow the initial rate of change of N to be positive? What Euler's method numerical simulation equation would you use to model this pro
Determine for the turbine (a) the mass flow rate, in kg/s, (b) the power developed by the turbine, in MW, (c) the rate at which entropy is produced, in kW/K, and (d) the isentropic turbine efficienc
Calculate the volume flow rate through the turbine [m3/s]. What is the optimum rotation rate [rpm] of the wheel (for maximum power)?
vinegar Is a solution of acetic acid dissolved in water. a 5.54 g sample of vinegar was neutralized by 30.10ml of .100 M NaOH.
Determine the temperature of the bottom plate and the ratio of the convective to radiative heat fluxes for 1 2 0.5. Evaluate air properties at T 350 K.
The mass flow rate is 0.5 kg/s. Plot each of the following versus the turbine exit temperature in C: the rate of exergy destruction in the turbine, in kW