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The amount of energy required to bring the vehicle to a stop is 600 KJ. Can you calculate the speed at which the brakes began in km/hr?
The inner surface of the cylinder is to be pressurized while the outer surface is not. what value of internal pressure would cause the cylinder to fracture (in the absense of any initial crack?)
Draw the free-body diagram and write the corresponding elemental equation for a spring element with the following definitions.
Determine the Hertz contact stresses for a 50 N coupling load. Is this kinematic coupling overloaded? Where are the locations of maximum compressive, shear and tensile stresses?
The turbine's isentropic efficiency is 90% and the pump can be considered ideal. The cycle is sized to produce 1000kW of power. Calculate the mass flow rate through the boiler.
If the steady-state temperature distribution within the wall is T(x)=a(L^2-x^2)+b where a=10 degrees C/m^2 and b=30 degrees C, what is the thermal conductivity of the wall? What is the value of the
What is the value of heat transfer coefficient at this location? Assume that the thermal conductivity of water is k=0.62 W/(m*K).
If it takes 0.9 times as long on a warmer day to hear the explosion, what was the temperature? Assume the pressure waves are travelling through a gas?
The sleeve is attached to each bar by a quarter inch diameter pin that goes through the sleeve and shaft at right angles to the axis of the shaft. If the torque transmitted by the shaft is 300 in-lb
What is the max allowable rate of heat generation per unit area if the composite temperature should not exceed 300 degrees Celcius? Take k = .45 [W/m-K] for the composite material.
Simplify the relation you obtain to reduce it to an expression which relates the temperature distribution to heat fluxes in the solid.
The constant pressure specific heat of vapor is 2190 J/kg*C, determine the heat transfer coefficient as a result of convection between the outer pipe surface and the surrounding air.
Determine the temperature at which condensation first occurs, in °C, and the fraction of the total mass that has condensed when the pressure reaches 5 bar. What is the volume, in m3, occupied by sat
What is the specific volume of water at 50 MPa and 80 degrees Celcius. What would it be if the incompressible liquid approximation is used?
The height from the ground to the top of the stairs is 2 ft. Based on ADA codes, the slope must be 1:12 or less. What is the ideal mechanical advantage of the ramp?
If the stresses necessary to maintain whisker/coating compatibility are assumed to only be acting in the direction of the filament axis, what is their sign and magnitude at 20 degrees C?
Determine the pressure, in lbf/in^2, at the bottom of the tank when filled to a depth of 20 ft. The density of water is 62.2 lb/ft^3, g=32.0 ft/s^2, and the local atmospheric pressure is 14.7 lbf/in
A rigid tank contains 2kg of saturated liquid and saturated vapor mixture @ 500KPa. What quality (x) do you need if you want the P-v diagram for this case to pass through the critical point?
The chiller capacity is 500 tons. Find the refrigerant rate, power input, and COP of this machine as well as the evaporator and condensing temperatures.
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.
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.
If the cooling water enters at 85F and leaves at 104F what is the mass flow rate of the cooling water. Assume the water is a compressed liquid at 30 psia.
Now heat is transferred, and the entire system cools to the surrounding air temperature of 70°F. Determine the total entropy generated during this process.
Assuming the variation of thermal conductivity of the wire with temperature to be negligible, obtain the differential equation that describes the variation of the temperature of the wire during stea