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A lunar transfer vehicle masses 50 tonnes (metric tons, or 1000 kg) fully fuelled, has a dry mass of 15 tonnes, which includes 5 tonnes of cargo. Assume lox/hydrogen engines with Isp = 445 seconds are used. How much Delta V does this vehicle provide?
a tank fitted with an electrical resistor holds 2 kg of nitrogen n2 initially at 1 bar. over a period of 10 minutes
A 4 m diameter sphere is embedded in insulation. The sphere contains a liquid-ice mixture maintained at 0 deg C. The ambient temperature surrounding the insulation is 25 deg C.
three horizontal forces are applied as shown to a vertical cast-iron arm. determine the resultant of the forces and the
a fluid has a viscosity of x nsm2 and is placed in a concentric cylinder viscometer. the gap width is g mm and the
refrigerant-134a enters the evaporator coils placed at the back of the freezer section of a household refrigerator at
a conical hole is machined in a metal whose emissivity is 0.5. the hole is 2.5 cm in diameter at the surface and 7.5 cm
what is the pressure differeence between the inside of a soap bubble and the atmosphere for a 3 inch diameter bubble?
a triangular access port must be provided in the side of a form containing liquid concrete. determine the resultant
A 6-kg plastic tank that has a volume of 0.18m^3 is filled with liquid water. Assuming the density of water is 1000 kg/m^3, determine the weight of the combined system
a a rigid tank containing 20 kg of refrigerant 134a as saturated vapor at 1.0 bars and -26.43 c is heated until the
a gas turbine power plant operates on the simple brayton cycle between the pressure limits of 100 and 800 kpa.air
a blackened plate is exposed to the sun so that a constant heat flux of 800 wm2 is absorbed. the back side of the plate
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