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1. Determine all possible two-stage compound gear combinations that will give an approximation to 21π. Limit tooth numbers to between 15 and 90. Determine the arrangement that gives the smallest error.
2. Determine all possible two-stage compound gear combinations that will give an approximation to π/2. Limit tooth numbers to between 20 and 100. Determine the arrangement that gives the smallest error.
The pre- exponential and activation energy for the dif- fusion of Ni in Cu are 2.7 X 10-4 m2/s and 236,000 J/mol, respectively.
Air with a mass of 0.5 kg, contained inside a piston-cylinder device with an initial pressure of 5 bar and initial volume of 0.1 m3, undergoes a thermodynamic cycle consisting of 3 processes as follows:
What will be his highest elevation? If his jump angle is increased to 30deg, will he stay in the air longer? Is his horizontal jump longer? Is this vertical maximum higher?
a mass of 3 kilograms of steam at 2 mpa and 250degc are contained in a rigid tank. how much heat must be removed from
Using Figure 21.4, plot (qualitatively) the fraction absorbed vs. wavelength for photons incident on the Sun. On the same graph, plot the fraction reflected vs. wavelength.
If the total heat-transfer rate is to be 300 kW and the average heat-transfer coefficient between the water and the air is 50 W/m2 ·K, calculate the area of the heat exchanger required and the mass rate of air flow through the exchanger.
2 forces are acting -20 and 20 ft away from the origin. each force is 1000 lbf and they are acting 60 degrees from the
a silicon wafer with thickness of 925 microm is being heated with a uniform heat flux at the lower surface. the silicon
oxygen enters an insulated 12-cm-diameter pipe with a velocity of 70 ms. at the pipe entrance the oxygen is at 240 kpa
make a form tool for lathe for making a convex groove of 3 mm radius. tool material will be tungsten carbide. know the
If it is observed that the fluid and the blood pressures balance each other when the bottle is 1.2 m above the arm level, determine the gage pressure of the blood.
1. Compute the mass fractions of proeutectoid ferrite and pearlite that form in an iron- carbon alloy containing 0.35 wt% C.
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