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The tree feller cuts off large trees near ground level and then continues to grasp the trunk. Determine the force in hydraulic cylinder AB for the position shown if the tree weighs 6000 lb. Determine the required pressure on the 4.72-in. diameter piston of the cylinder.
a frictionless piston-cylinder device contains 2 kg of nitrogen at 100 kpa and 300k. the nitrogen is compressed in a
A compressor, having 80% efficiency, requires 25 MW power to pressurize air. Calculate the power requirement for the same inlet conditions and exit pressure if the compressor is made isentropic by redesigning it
a cylinder of radius r0 length l and thermal conductivity k is immersed in a fluid of convection coefficient h and
draw the shear and bending-moment diagrams for the beam and loading shown and determine the maximum normal stress due to bending.
Important information about Multipal choice question on mechanics, A machine is supplied energy at a rate of 4,000 W and does useful work at a rate of 3,760 W. What is the efficiency of the machine?
a cylindrical tank is to contain gas at a pressure of 400 psi and for safety reasons the hoop stress in the tank wall
1. steam is contained in a closed rigid container with a volume of 1 m3. initially the pressure and temperature of the
a riser in the shape of a sphere is to be designed for a sand casting mold. the casting is a rectanglar plate with
you decde to have 2 hard boiled eggs for breakfast and prepare them by placing 2 refrigerated eggs into a pot of
design a closed-system air-standard gas power cycle composed of three processes and having a minimum thermal efficiency
at the beginning of the compression process of an air-standard diesel cycle operating with the compression ratio r 18
a compressor is a gas pumping device that takes in a gas at low pressure and discharges it at a higher pressure. since
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