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A rocket having a total mass of 8 Mg is fired vertically from rest. If the engines provide a constant thrust of T=300 kN, determine the power output of the engines as a function of time. Neglect the effect of drag resistance and the loss of fuel mass and weight.
a rigid tank contains 20 lbm of air at 20 psia and 70degf. more air is added until the pressure and temperature rise to
r-22 in a pistoncylinder has mass 1 kg and temp. 10degc with a volume of0.02 m3 . initially state 1 the piston rests on
five kilograms of air at 300 k is contained in a vertical cylinder by a frictionless piston of a mass such that the
make a text file that contains what is your absolute path, and call it paths.txt
an ideal vapor-compression refrigeration cycle opperates at steady state with refrigeratn 134a as the working fluid.
Determining the largest couple that can be applied to a beam in pure bending. A beam of cross section shown is extruded from an aluminum alloy for which σy = 310 MPa and σu = 480 MPa.
a smoke stream from a smoke generating tube is often used as a simple method of flow visualization in wind tunnels.
the water level of a tank on a building roof is 20m above the ground. a hose leads from tank bottom to the ground. the
a piston-cylinder device contains air initially at 150kpa 20oc and 0.5m3. the air is now compressed in a polytropic
steam enters an adiabatic turbine at 5 mpa and 500degc with a mass flow rate of 5 kgs and leaves at 100 kpa. the
water flows through a pipe ab 1.2 m diameter at 3 ms and then passes through a pipe bc 1.5 mdiameter. at c the pipe
heat losses through windows in buildings are substantial. what percent reduction in heat loss would be mitigated by
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