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The cross section of a trap door hinged at A and having a mass m and a center of mass at G is shown in the figure. The spring is compressed by the rod which is pinned to the lower end of the door and which passes through the swivel block at B. When () = 0, the spring is undeformed. Show that with the proper stiffness k of the spring, the door will be in equilibrium for any angle ().
a 3.084-kg steel projectile is fired from a gun. at a particular point in its trajectory it has a velocity of 300 ms an
R134a rests in a compressed fluid can at 120psia, and a specific volume of 0.38ft3/lbm. What is its temperature and quality? Half of the mass is now vented off to the atmosphere. The can is allowed to exchange heat with the surroundings at 100°F unt..
a special c-clamp uses a 0.5-in. diameter acme thread and a collar of 0.625-in. effective mean diameter. the collar is
carbon monoxide at 77f 1 atm enters and insulated reactor operating at steady state and burns with air entering at 77 f
25 of the cables have failed after 12 years and 55 failed after 16 years. if the distribution if normal what is the
an electrical power plant has stack gases exhausting at 150 degree c. design a basic rankine cycle that uses water
a cylindrical pressure vessel of diameter 2 m and wall thickness 20 mm is subjected to an internal pressure of 20 bar 2
a power cycle operating at steady state has a thermal efficiency of 35 and generates 100 mw of electricity while
they are using temperature and that is throwing me off. my books examples use watts for the high and low temp sources
draw a block-diagram of a yaw rate damping system.include the following components the airframe the rudder actuator the
a balanced wheel supported on springs is rotating at 1200 rpm. if a bolt weighing 15 g and located 5 cm from center
For integrated circuits, Al lines are commonly placed on Si to act as electrical conductors between different parts of the device. Assuming that the Al is deposited at a temperature of 300oC, determine the CTE (Coefficient of Thermal Expansion) misma..
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