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Show that the thrust developed by a stationary rocket motor is F = rho*A*U^2 + A(p- p_atm) where p_atm is the atmospheric pressure, and p, rho, A, and U are, respectively, the pressure, density, area, and velocity of the fluid at the nozzle exit.
Kinetics of Particles : Newton's Second Law, Determine the maximum theoretical speed that may be achieved over a distance of 50 m by a car starting from rest
a supply of steam at 100 kpa 150degc is needed in a hospital for cleaning purposes at a rate of 15 kgs. a supply of
Determine the acceleration of the cabinet when sA = 40 ft. Note that when sB = 0, sA = 0 (points A and B are coincident).
it has been shown that the cop for a carnot refrigerator. is greater than the cop for a real refrigerator . show the
Sea water (p=1025 kg/m3) flows through a pump at 0.21 m3/s. The pump inlet is 0.25m in diameter. At the inlet the pressure is -0.15 in of mercury. The pump outlet, 0.152 m in diameter, is 1.8 m above the inlet. The outlet pressure is 175 kPa. If the ..
A fire truck draws water from an open constant-level reservoir through a hose of 0.2 ft2 cross section. The water is discharged from the pump through another 0.2 ft2 hose to a surge tank pressurized to 120 psig with air at the top. The pump adds 970 ..
a hail storm caused nearly golf-ball sized hail to fall on a house. the hailstones were nearly spherical with a
A 1200 kg car is travelling at a high rate of speed (V0) as it reaches the summit of a small hill that can be approximated by the equation y=1.25sin(0.3x)+cos (0.07x)-5 from x= 0 to 50m. At the summit of the hill a deer runs in front of the car, and ..
Gate AB in fig 2 is a one-quarter circle, 5 m wide into the paper, hinged at B and resting on a smooth wall at A. Find the total horizontal force on the surface.. Find the total vertical force on the surface.
a 1x2-in bar is 20 in. long and made of steel with sy 25ksi. with a safety factor of 4 what axial compressive load can
find the force f required to hold the plug in place at the exit of the water pipe. the flow rate is 1.5 m3s the
a prototype disk brake for a bicycle was designed and consists of a pair of pads area 5 cm x 1 cm pressed against
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