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The 100-mm-radius cam shown is used to control the motion of the plate CD. Knowing that the coefficient of static friction between the cam and the plate is 0.45 and neglecting friction at the roller supports, determine (a) the force P required to maintain the motion of the plate, knowing that the plate is 20 mm thick, (b) the largest thickness of the plate for which the mechanism is self locking (i.e., for which the plate cannot be moved however large the force P may be).
a woman with wieght 637n lies on a bed of nails. the bed has a weight of 735n and a lenght of 1.72m. the bed is held up
A three-point bending test was performed on a glass specimen having a square cross-section of 15 mm length on each edge. The specimen fractured at a load of 4770 N when the distance between the support points was 41 mm.
Since the half-life of 235U (7.13x10^8 years) is less than that of 238U (4.51x10^9 years), the isotopic abundance of 235U in natural uranium has been steadily decreasing since the earth was formed. How long ago was the isotopic abundance of 235U in n..
Consider the matrix of elastic constants for a composite consisting of an elastically soft matrix reinforced by a 90? cross-ply of stiff ?bers. The general form of the matrix of elastic constants is
The supply of water to the turbine is through a pipeline from a reservoir whose level is 350 m above the nozzles. Allowing 5% for friction loss in the pipe, calculate speed, diameter of jets and mean diameter of bucket circle. Take velocity coeffi..
Refrigerant 22 is the working fluid in a Carnot vapor refrigeration cycle for which the evaporator temperature is 230°C. Saturated vapor enters the condenser at 36°C, and saturated liquid exits at the same temperature. The mass flow rate of refrig..
A typical gas stove burner supplies a kettle filled with water at a rate of 15,000 Btu/hr with a flame temperature of 750C
two concentric helical compression springs made of steel and having the same length when loaded and when unloaded are
a pressure transducer exhibits a temperature sensitivity of 0.05 units per degree celsius and a pressure sensitivity of
a 1700 kg car starts from rest at position a and accelerates uniformly up the incline reaching a speed of 100 kmh at
A closed, rigid tank fitted with a paddle wheel contains 0.1kgof air, initially at 300 K, 0.1MPa. The paddle wheel stirs the air for 20 minutes, with the power input varying with time according to W = -10t, where W is in watts and t is time, in minut..
in an annealing process a stainless steel plate 50 mm thick will be heated to at least 600degc from an initial
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