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1. The circular cylinder weighs 50 lb and is held by a cord fixed to its periphery at B and to the ground at A. If the coefficient of static friction is 0.60, calculate the force P required to cause the cylinder to slip.
2. The design of the cam-lock vise provides a quick positive clamping action with a friction coefficient between the cam and the movable jaw A of 0.30.
(a) As the cam and lever are rotating clockwise approaching the locking position shown with P = 30 lb, determine the clamping force C.
(b) With P removed, find the friction force F in the locking position.
(c) Determine the force P', opposite from P, required to release the clamp.
Water is contained in a 0.2 m3 vessel at 200 C. The mass of water in the vessel is measured to be 2 kg. Determine (a) the pressure in the vessel, (b) the enthalpy, h, of the water in kJ/kg, (c) the mass and volume of vapor in the vessel.
Samples of ?? 4 items each are taken from a manufacturing process at regular intervals.
A steel pipe with a 5 cm OD is covered with a 6.4 mm asbestos insulation (k=0.166 W/m.K) followed by a 2.5 cm layer of fiber glass insulation (k= 0.048 W/m.K). The pipe wall temperature is 315oC and the outside insulation temperature is 38oC. Calcula..
A flow of 90% CH4, 10% H2 is passed into a furnace at 900 K. Determine whether carbon forms if the total pressure is 1.2 atm, carefully justifying your answer. Calculate the composition ( expressed as a molar percentage) of the gaseous mixture at thi..
a double acting hydraulic cylinder is hooked up in the regenerative circuit. the relief valve setting is 1000 psi. the
In a four bar mechanism ABCD, AD is fixed and is 150 mm long. The crank AB is 40 mm long and rotates at 120 rpm clockwise, while the link CD = 80 mm oscillates about D. Link BC and AD are of equal length. Using the analytical/mathematical solution me..
in anthracene scintillation photons have a wavelength of 447 nm. if i mev of energy is deposited in an anthracene
a civil engineer must design a wheelchair accessible ramp next to a set of steps leading up to a building. the height
a diffuser is a device that the flow of air in order to recover a pressure loss. for the diffuser shown in the attached
A wheel is rotating at a uniform clockwise speed of 2 rad/s when a variable torque is applied to its shaft at time t=0. As a result there is a clockwise angular acceleration \alpha which increases in direct proportion to the angle \Theta through whic..
a rigid tank contains 20 lbm of air at 20 psia and 70degf. more air is added to thenbsptank until the pressure and
determine the minimum pump power required to pump water from one reservoir to another at an elevation of 110 m above
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