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The United States Navy wants to deploy a system of free floating sonar buoys. The electronics are contained in a spherical shell 2 feet in diameter that weights 300 pounds (shell plus equipment). A 4 foot long 4 inch diamter cylinder with radio transmitter and global positioning instrumnetation that weighs another 30 pounds is attached between the sphere with the electronics and the float. The Navy would like the center of the sphere to be suspended 6 feet below the surface of the water and the top of the float to be 6 inches above the water surface to minimize its radar image. The density of the float materail is 25 pounds percubic foot. The specific weight of sea water is 64 pounds per cubic foot.
The components are to be linked to one another with a uniqu linakge system that adds nothing to overall sphere-cylinder-float vertical dimension. What size float (length and diameter) is needed if the float is a cylinder with its longitudinal axis arranged veritically?
a. given that the surface energy mass density and molar mass of ag are respective 1140 ergcm2 10.5 gcm3 and 108 gmolb.
two rigid tanks that are each 20 ft3 are connected by a line containing a control valve that is initially closed. tank
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Consider a 70-kg woman who has a total foot imprint area of 400 cm2. She wishes to walk on the snow, but the snow cannot withstand pressures greater than 0.5 kPa. Determine the minimum size of the snow shoes needed.
the 200-kg boat is powered by the fan which develops a slipstream having a diameter of 0.75 m. if the fan ejects air
Determine the rate of heat transfer to the mid-stage cold head and determine the rate of heat transfer to the cold head
Estimate a value for the convective coefficient, h, with the basis of your estimate and show a diagram with the energy fluxes on the pipe.
liquid octane c8h18 at 25ordmc 1.0 atm enters a well-insulated reactor and reacts with air entering at the same
In the idealized model attached shown, m = 15 kg, k = 135 N/m, and the viscous damping ratio is 0.15. Assume that an external harmonic force F(t) = 15 cos 4 t acts on the system with F0=15 N and forcing frequency of 4 rad/s.
consider a combined gass steam power plant that has a net power output of 450 mw. the pressue ratio of the gas turbine
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a rigid tank contains an ideal gas at 40u2070c that is being stirred by a paddle wheel. the paddle wheel does 200 kj of
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