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Class 20 and class 60 gray cast irons have tensile strengths of about 20 and 60 ksi respectively. Assuming that the fractures start from graphite ?akes and that the ?akes act as preexisting cracks, use the concepts of Grif?th analysis to predict the ratio of the average graphite ?ake sizes of the two cast irons.
calculate the resistance of a platinum wire that is 2 m in lenth and has a diameter of 0.1cm. the resistivity of
a cord is wound in the slot of cylinder a. mass b moves downward with a velocity of 6 m. assume no slipping of the
design a computer programme using freudestein equation to synthesise a four bar linkage using three precision points also using more than three points.
A refrigerating plant operating between temprature limit of 253k and 307k provides 4.5kJ/s of refrigerating effect. If the refrigerating efficiency of the plant is 0.76. calculate the power required to drive the plant.
a mass of 10-g of nitrogen is contained in a spring loaded piston cylinder. the spring constant is 1 knm and the piston
A steady-state, well insulated turbine operated in two stages in series using steam . The first stage has an efficiency of 85% and the second stage 90%. Steam enters the first stage at 400 C degree and 4 MPa and exits at 1.5 MPa.
an air-hockey puck has a mass of 50 g and is 9 cm in diameter. it is placed on an air hockey table at 20 c and the film
a 180 degree elbow takes in water density water 1000 kgm3 at an average velocity of 1 ms at the horizontal inlet where
two kg of saturated liquid water at 1 bar is compressed to 25 bar and 100degc in a water pump. determine the change in
The bottom of a chair (where you sit, the ‘seat’) will be injection molded by itself in a mold. Assume the chair is a disk, 24 inches in diameter and 1/10 inch thick. If the injection pressure is 1600 psi, what is the minimum clamp tonnage you need f..
A laminated thick-walled cylinder was fabricated by shrinking a steel (E=200 GPa and nu=0.03) sleeve having an inside diameter of 199.800mm and an outside diameter of 300mm onto a steel tube with an inside diameter of 100mm and an outside diameter of..
for the following electrochemical cell pt1 o2 g 1 atmh cl- 0.05mh cl - 1.00 mo2g 1 atmpt2a calculate the cell
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