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An assembly comprised of circular AISI 301 stainless steel plates having a total exposed area of 1.5 m2 are bolted together with chromium-plated steel cap screws having a total exposed area of 110 cm2. The environment contains moisture, and possibly some salt (see Figure P9.8).
(a) Which metal will corrode?
(b) If half as many bolts are used, what influence would this have on the total rate of corrosion?
(c) How could corrosion be reduced?
There is no significant heat transfer from the boiler to its surroundings. Assuming steady state and neglecting the effects of motion and gravity, determine
A spring stiffness k= 500 n/m is mounted against a 10 kg block. if the block is subjected to a force of 1 KN determine the velocity of the block at s=0.3 m when s=0, the block is at rest and the spring is uncompressed. The coefficient of fricktion is..
Estimate the speed of fall of a 6-ft man with arms and legs outstretched. Make reasonable assumptions. Now give the man a 6-m-diameter parachute and calculate his speed of descent, again making reasonable assumptions.
Write an expression for the new temperature of the sample
How much would the insurance reimbursement be for a television system damaged by fire if it was purchased 2 years ago for $6,000 and has a life expectancy of 5 years?
a suppose the sound pressure level at a distance of 100 m from a single wind turbine is 55 db. what is the sound power
a furnace can deliver heat qh1 at th1 and it is proposed to use this to drive a heat engine with a rejection at tatm
a 12-mm diameter jet of water discharges vertically into the atmosphere. due to surface tension the pressure inside the
This usually means an antenna between λ/50 to λ/10 in length. Given: In the short dipole, the current is linear: I(z') = I0(1 - (2/l)|z'|), where I = λ/20 is the total length of the dipole and 10 is constant.
If the ventilation requirement of a 2.7-m-high, 200-m2 residence is tobe met entirely by a fan, determine the flow capacity in L/min of thefan that needs to be installed. Also determine the diameter of the duct if the air velocity is not to exceed ..
consider two geothermal wells whose energy contents are estimated to be the same. will the exergies of these wells
Make a sketch (to scale) of the pitch cones of the two gears in mesh. Show the back cones of each gear and label the pitch cones and the back cones.
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