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A racing boat planes over the water at 80 MPH. The water temperature is 75F. The wetted surface of the boat, i.e., the part of the boat in contact with the water, is 3 ft wide and 8 ft long. Estimate the power required to overcome the surface resistance generated by the water against the wetted surface of the boat.
Knowing that the pipe has inner and outer dimensions equal to 35 and 42 mm, respectively, detemine the normal and shearing stresses at point a and point b.
large cylindrical bales of hay used to feed livestock in the winter months are d2m in diameter and are stored
one car p heading north begins at rest and accelerates with acceleration a. the other car q begins with a velocity of
consider a homogenous spherical radioactive material of radius ro 0.075 m that is generating heat at a constant rate of
derive an expression for the compressibility of air represented by tau for 1 and isothermal process and 2 for an
the velocity of a particle at t2 seconds is 50 ms with an angle of 40 degrees down and to the right. at t6 seconds it
nitrogen gas is flowing in a 50mm diameter pipe at the rate of 0.05kgs. the nitrogen flows through a partially closed
consider a 15-cell stack hydrogen fuel cell operating steadily in series with 200 cm2 active area per electrode with a
A small boat hangs from two davits, one of which is shown in the figure. The tension in line ABAD is 82 lb, determine the moment about C of the resultant force exerted on the Davit.
the performance of a device is defined as the ratio of the desired output to the required input and this definition can
steam enters a turbine at 40 bars 440c and 100 ms through an pipe with a cross-sectional area of 0.050 m2. at the exit
suppose that a nuclear plant generates heat in the amount of 2 x 107 j from its fuel rods at a temperature of 1200c and
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