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A mineshaft is drilled from the surface of a planet of mass M and radius R all the way to the center. If a rock is dropped into the shaft, at what speed v would it hit the bottom of the shaft?
determine the minimum value of basic dynamic loading rating for selecting ball bearing to 5000 hrs of operation with
Estimate the rupture lifetime (in hrs) for some cylindrical component originally 10.5 mm in diameter and 496 mm long that is fabricated from a low carbon-nickel alloy; assume that it is to be exposed to a tensile load of 6300 N at 538°C. The logarith..
an air-standard otto cycle has a compression ratio of 7.5. at the beginning of compression p185 kpa t1320c the mass of
assume that a person skiing in the mountains at an altitude of 15000 ft takes in the same volume of air with each
an element of a material experiences stresses sigmaz ?20 mpa sigmax 40 mpa tauexz 40 mpa sigmay 80mpa. the shear
A piston-cylinder assembly contains 2 lbm of water, initially at 100 lbf/in.2 and 400o F. The water undergoes two processes in series: a constant pressure process followed by a constant volume process. At the end of the constant volume process, the t..
a cylindrical bar of aluminum 19 mm 0.75 in in diameter is to be deformed elastically by application of a force along
A piston-cylinder device initially contains 0.007m^3 of nitrogen gas at 130kPa and 120C. The nitrogen gas is now expanded polytropically to a state of 100 kPa and 100C. Determine the boundary work done during this process. I know I need to use the fo..
The room air at 20oC that was trapped in the glass gets heated up to 40oC and some of it leaks out so the net resulting pressure inside is 2 kPa above ambient pressure of 101 kPa. Now the glass and the air inside cools down to room temperature, wh..
magneto is seeking to produce a new helmet using a deep drawing process in which a sheet of 3103 aluminum will be
Drought conditions in the southwestern United States have prompted officials to question whether the operation of residential swimming pools should be permitted.
25 of the cables have failed after 12 years and 55 failed after 16 years. if the distribution if normal what is the
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