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A form of corrosion called pitting corrosion can occur in aluminum in fresh water. As the name suggests, pits form on the surface of aluminum in this type of corrosion. The pit depth, d follows a cube root relationship time, t:
Normally, a 5 μm thick Al2O3 film forms on the surface of aluminum. If we double the thickness of the film, by what factor will the time to perforation increase
water flowing in a horizontal 30 cm diameter pipe at 5 ms and 300 kpa gage enters a 90o bend reducing section which
an electrical power transformer of diameter 250 mm and height 600 mm dissipates 1200 w. it is desired to maintain its
the 2-kg collar is released from rest at A and travels along the smooth vertical guide. determine the speed of the collar when it reaches position B.Also ,find the normal force exerted on the collar at this position.the spring has an unstrectched ..
a 20-mm diameter rod made of a ductile material with a yield strength of 350 mpa is subjected to torque of 100 n.m and
a skydiver of weight 84kg jumps from a plane 3300m above the ground. they initially free fall for a period of seconds
We have 0.25 lb of refrigerant 134a at 35 psi, and a quality of x=0.15. If it is expanded, in a constant pressure process, to two times its original volume, determine the final temperature, and find the work of the constant process.
two kg of saturated liquid water at 1 bar is compressed to 25 bar and 100degc in a water pump. determine the change in
a rectangular casting having the dimensions 3 inch by 5 inch by 10 inch solidifies completely in 11.5 min. using n2 in
each of the two slender rods is .75m long and has a mass of 6 kg. each rod has a moment of inertia of iml212 about the
the surface of a steel gear made of 1020 steel 0.20 wt c is to be gas-carburized at 927 deg c. calulate the carbon
On which of these systems would you expect slip to ?rst occur as the applied stresses increased? Assuming slip on that system, determine the ratios of the strains, ε2/ε1 and ε3/ε1.
a ceramic bidet failed catastrophically in normal use causing serious lacerations to the person concerned. the facture
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