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A 10-kg block is attached to spring A and connected to spring B bycord and pulley. The block is held in the position shown(block is held above ground on support with spring under supportand on top of pulley, both with k=2 kN/m) with both springsunstretched when the support is removed and the block is releasedwith no initial velocity. Knowing that the constant of eachspring is 2 kN/m, determine (a) the velocity of the block after ithas moved down 50 mm, (b) the maximum velocity achieved by theblock.
a heat pump with a cop of 3.0 is used to heat air contained in a 1205.4m3 of well-insulated rigid tank. initially the
a system with an initial volume of 2 m is filled with water at 3 mpa 400 deg c.it is now cooled at constant volume to
a system executes a power cycle while receiving 1050 kj by heat transfer at a temperature of 525 k and discharging 700
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steam enters one inlet of an adiabatic mixing chamber at 1.4mpa and 300 c. at the second inlet steam enters at 1.4mpa
an initially empty bottle is filled with water from a line at 0.8 mpa 350 deg c. assuming no heat transfer and that the
2 kg of saturated water vapor at 600 kpa are contained in a piston-cylinder device. the water expands adiabatically
a cannon is pointed at 60 degrees angle relative to flat horizontal field. it fires a projectile with a muzzle speed of
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a whip crack is illustrated below. to crack the whip it is thrown forward with a velocity of 10 ms and the handle is
a 30 m x 30 m concrete floor slab is heated by 0.025 m diameter hot water pipes sunk beneath the floor surface and
at time t0 the postion vector of a particle moving in the x-y plane is r5i m. by time t 0.02 s its position vector has
an aluminum rod is made in the form of a hollow square tube. 2.25 in outside with a wall thickness of 0.120 in. its
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an inventor claims to have developed a refrigeration unit that maintains a cold space at -10degc while operating in a
an ideal reheat rankine cycle with water as the working fluid operates the inlet of the high-pressure turbine at 8000
a 14 scale model of a tractor trailer is tested in a wind tunnel under standard sea level conditions. the model
a long trough is supported by a continous hinge along its lower edge and by a series of horizontal cables attached to
consider the equation dydt y2y2-1 a- determine the equilibria and classify each one as asymptotically stable unstable
a mass of 200 grams of copper whose specific heat is 0.095 is heated to 100deg c and placed in 100 grams of alcohol at
a pressized tank contains a fluid with a dinsity of 900 kgm3. the absolute pressure of the air above the fluid is p400
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