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A 2-in.-diameter hole, 5 in. long, is drilled into the center of the top face of a steel cube that is 6 in. on each side. The hole is filled with lead, which has a unit weight of 710 pcf. Locate the center of gravity of the cube with respect to the bottom.
A rotating saw blade has 48 teeth and 4 slots. If the room where the saw is used is illuminated with a pulsed light source, at what pulse frequencies will a) the saw blade teeth appear to be stationary? b) The blade slots appear stationary? c) Will t..
For a system where abnormal grain growth usually occurs during sintering, what possible measures can be taken to suppress abnormal grain growth in view of the structural change of grain boundaries?
Estimate the heat transfer coefficient between air and the inner tube - The air enters at 16oC and leaves at 32oC. Its flow rate is 30 m/s.
a water cannon for rock tunneling operates by using compressed gas for accelerating a 65-kg high-strength titanium
a newly developed diagnostic test indicates that 80 of students predicted to score 100 on an exam actually do. the
Air enters a compressor operating at steady state at 1 bar, 228C with a volumetric flow rate of 1 m3/min and is compressed to 4 bar, 1778C. The power input is 3.5 kW. Employing the ideal gas model and ignoring kinetic and potential energy effects,..
an engineer is designing a hydraulic lift with a capacity of 10 tons. the moving parts of this lift weigh 1000lbf. the
(a) What are the gas and water outlet temperatures? (b) Assuming fully developed flow, what is the tube- side convection coefficient? (c) With all other conditions remaining the same, pl
A hemispherical droplet of liquid water, lying on a flat surface, evaporates by molecular diffusion through still air surrounding the droplet. The droplet initially has a radius R. As the liquid water slowly evaporates, the droplet shrinks slowly wit..
The radius of gyration about an axis passing through the axis of symmetry of the 1.6-Mg space capsule is kz = 1.2 m and about any transverse axis passing through the center of mass G, kt = 1.8 m.
A volcano has erupted, spewing stones, steam, and ash several thousand feet into the atmosphere. After some time, the particles begin to settle to the ground. Consider a nearly spherical ash particle that is 50 microns in diameter, falling in air who..
ater enters a reversible steady-state device at 125degc and 400 kpa and leaves at 300degc and 200 kpa. heat is added
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