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The crate, of mass 250 kg, hanging from a helicopter (shown in Fig. 2.74(a)) can be modeled as shown in Fig. 2.74(b). The rotor blades of the helicopter rotate at 300 rpm. Find the diameter of the steel cables so that the natural frequency of vibration of the crate is at least twice the frequency of the rotor blades.
Calculate maximum tensile stress in wood and steel, and determine the implied safety factors of the wood and steel with respect to yield of steel or failure of wood
Select a pair of structural steel channels mounted back to back to support the loads in such a way that the deflection at midspan will not exceed 1/ 16 in and the maximum stress will not exceed 6 kpsi. Use superposition.
The main bearing of a steam engine is 100 mm in diameter and 175 mm long.the bearing support a load of 28 kn at 250 r.p.m.if the ratio of the diametral clearance to the diameter is 0.001 and the absolute viscosity of the lubricating oil is 0.015 kg/m..
Determine the mass flow rate per unit frontal area. Assuming the flow is isentropic, calculate the exit Mach number and the static pressure ratio across the cascade.
consider an ideal steam reheat cycle in which the steam enters the high pressure turbine at 600 psi and 700f and then
A solution of cyclohexanone (4.0 mg/mL) in the solvent selected in part (b) exhibits a blank-corrected absorbance of 0.800 in a cell with a path length of 0.025 mm. What is the detection limit for this compound under these conditions if the noise ..
a six-cylinder four-stroke spark-ignition engine operating on the ideal otto cycle takes in air at 100 kpa and 25oc and
an irrigation pump is used to draw water from a reservoir and deliver it to an irrigation ditch at a mass flow rate of
you are to design a balloon capable of lifting 200 kilograms the mass of the gas in the balloon must be 200 kilograms
Assuming saturated properties out of the evaporator and condenser
Identify and understand each phase of the product development process: The assignment includes the practical application of the first few phases of a PD process.
a solid hollow tube thin wall with pin in the bottom and the top part is connect with another tube and there is a force
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