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A ship may exert an estimated pull of 8000 lb on its hawser (a heavy rope), which is wrapped around a mooring post on the dock. Determine the number of turns required of the hawser around the post so that the pull at the free end will not exceed 40 lb. Assume a coefficient of static friction of 0.35.
calculate the line voltage and current at the load for t > 0 for a generator voltage of 1 V.
What is the prudent economic decision and recalculate the above problem for this higher, i.e. 11%, return on investment.
a motorist decreases the speed of an automobile at a constant rate from 45 to 30 mih over a distance of 750 ft along a
The drag of a football is investigated in a water tunnel with a quarter-scale model and matching the full-scale Reynolds number. If the actual expected speed is assumed at 95 km/h, estimate the ratio of the drag force between the model and the ful..
Calculate the mass flow (in slugs/per second) that comes out the exit of the engine. The plane is at standard altitude 50,000 ft and velocity = 2200 ft/s. Would appreciate attack to problem.
The mass is constrained to move vertically and is subjected to a vertical damping force of the type Fcosθt. Determine the frequency at which resonance will occur and the maximum allowable value of ‘F' if the amplitude at resonance is to be restrict..
What is the evaporation rate (kg/h) of water from the plate? What electrical power is required to maintain steady-state conditions? After a long period of operation, all the water is evaporated from the plate and its surface is dry. For the same ..
In a two dimensional flow over a solid plate, the x component of the velocity varies linearly from zero at the plate surface to 2 m's at y = 5 cm. The y component of velocity is zero everywhere i.e. it is a parallel flow over a flat plate. Obtain an ..
The velocity ?eld in a ?uid ?ow is given by V ¼ 2yi þ xj þ tk: Determine the magnitudes of the acceleration, the angular velocity, and the vorticity at the point (2, 1, 21) at t ¼ 4 s.
an electrical wire having a diameter of 1.5 mm and covered with a plastic insulation thickness 2.5 mm is exposed to
The propeller of a wind generator is supported by a hollow circular shaft with 0.4 m outer radius and 0.3 m inner radius. The shear modulus of the material is G = 80 GPa.
Derive an expression for the instantaneous electromagnetic torque during a three phase short circuit at the terminals. Assume the stator terminals of the machine are initially open-circuited and the speed does not change during the fault.
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