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A two stage crushing operation feeds 0.6m diamater ore into a primary crusher at a rate of 25 mt/hr. Calculate the re-circulating load in the primary crusher.
The steel bar has the orginal dimensions shown in the third figure below. If it is subjected to an axial load of 50kN, determmine the change in its length and its new cross sectional dimensions at
The plate is subjected to an axial force of 75 kN, The objective is to determine the maximum stress developed in the plate. Use Young's Modulus E=205 GPa.
A 0.12 ounce bullet hits at 2000 ft/s a suspended 10-lb block of wood and becomes embedded in it. The angle α through which the wires supporting the block rotate as a result of the impact is
A blower handles 1 kg/sec of air at 20 Deg C and consumes a power of 15 KW. The inlet and outlet Velocities of air are 100 m/sec and 150 m/sec respectively. Find the exit air temperature, assuming a
Suppose that a nickel filter is required to produce an intensity ratio of Cu K alpha to Cu K beta of 100/1 in the filtered beam. Claculate the thickness of the filer and the transmission factor for
A natural gas-fired boiler in a textile plant in sharjah is used to provide steam at 130oC. At times of high demand, the boiler supplies heat to the steam at a rate of 30 MJ/s.
Kerosene having a specific weight of 50 lb/ft3 is flowing at 10 gal/min from 1inch pipe to a 2 in pipe. Calculate the differences in the two pipes.
Carbon dioxide enters an adiabatic compressor at 100 kPa and 300 K (actual inlet conditions) at a rate of 0.5 kg/s and exits at 600 kPa and 450 K (actual outlet conditions). Neglecting potential and
Steam enters a nozzle at 30 bars and 320C and leaves at 15 bars with a velocity of 535 m/s. The mass flow rate is 8000 kg/h. Compute the exit temperature in degrees Celsius.
A rigid container is filled with 1 kg of water.the volume of the container is 125-L.The initial pressure of the container is 2 MPa.The container is then cooled to 40 C.Find the initial temperature
If the load has a weight of 200kN, determine the x,y,z components of reaction at the ball and socket joint A and the tension in each os the wires.
The wood beam is subjected to a load of 12 kN. If a grain of wood in the beam at pointA makes an angle of 25 degrees with the horizontal. determine the normal and shear stress that act perpendicula
The state of stress at a point is shown on the element. Determine (a) the principle stress and, (b) the maximum in-plane shear stress and average normal stress at the point.
Calculate the convective heat transfer coefficient. Determine the heat transfer in W for an isothermal plate maintained at 57 °C.
Air flows through the Brayton cycle with a mass flow rate of 400 kg/s and enters the first compressor with a pressure of 100kPa and a density of 1.2 kg/m3.
Determine the mole fractions of polyvinyl chloride and polyvinyl acetate in a copolymer having a molecular weight of 11,000 g/mol and a degree of polymerization of 150.
A rigid, well insulated tank contains a two-phase mixture consisting of 0.07lb of saturated liquid water and 0.07lb of saturated water vapor, initially at 20lbf/in^2.
A hot rolled shaft is subjected to torsional load that varies from 320 Nm clock wise to 120 Nm anti -clockwise and an applied bending moment at a critical section varies from 400 Nm to 200 Nm. The s
Air enters an ideal diffuser operating at steady state at 1 bar, -3°C and 260 m/s and exits at with a velocity of 130 m/s. Determine : the exit temperature and pressure for the air.
In a preliminary design for a mail-sorting machine, parcels moving at 2 ft/s slide down a smooth inclined ramp and a horizontal surface with kinetic coefficient of friction μk with the parcel.
Is the flow laminar or turbulent? Justify your answer. What is the total heat which can be dissipated if the plate temperature is not to exceed 80 °C.
If the tension is maintained at the value determined in part (a), what is the magnitude of the crates velocity when it has moved 2m up the dock?