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The ends of two fixed rods A and B are each made in the form of a single-threaded screw of mean radius 6 mm and pitch 2 mm. Rod A has a right-handed thread and rod B has a left-handed thread. The coefficient of static friction between the rods and the threaded sleeve is 0.12. Determine the magnitude of the couple that must be applied to the sleeve in order to draw the rods closer together.
a heat pump heating system supplies 5.8kw of thermal energy to the inside of a house. the external surfaces of the
a 1000 mw coal fired power plant operates with an annual plant capacity factor equal to 75. the plant burns coal which
2.2 lb of ammonia in a piston cylinder assembly undergoes two isothermal processes in series. The first process from an initial state where p1=120lbf/in^2 with a quality is 85% to a final state where the ammonia is saturated vapor. D
an automatic automotive transmission casing has a shape of a rectangular box with side dimensions 40 cm x 30 cm x 50
steamboat springs geothermal power plant in nevada operates between a steam temperature of 220 c and an ambient
consider an oblique shock wave with a wave angle of 30 degree. the upstream flow mach number is 2.4 calculate the
A large multinational banking company wants to determine whether there is a significant difference in the average dollar amounts purchased by users of different types of credit cards. Among the credit cards being studied are MasterCard, Visa, Dis..
determine the mole fractions of polyvinyl chloride and polyvinyl acetate in a copolymer having a molecular weight of
1. A steel bar, 20 mm in diameter and 200 mm long, with an emissivity of 0.9, is removed from a furnace at 455°C and suddenly submerged horizontally in a water bath under atmospheric pressure. Estimate the initial heat transfer rate from the bar.
a 3-phase 25 kva 208 v 60 hz alternator generator is operating under balanced conditions and supplies a current of 20 a
Plot the variation of the local heat transfer coefficient, hx(x), with distance along the plate for three flow conditions corresponding to transition Reynolds numbers of (i) 5 X 105, (ii) 3 X 105, and (iii) 0 (the flow is fully turbulent).
consider a 300 mm x 300 mm window in an aircraft. for a temperature difference of 80oc from the inner to the outer
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