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A balloon filled with helium gas is to be used to lift a military vehicle that weighs 2570 pounds. As learned in class, the density of helium is about one-seventh the density of air. Assuming the average density of helium to be 0.011 lbm/ft3, what is the minimum diameter of the balloon required to lift the vehicle? Neglect the mass of ropes and harnesses, and consider standard atmospheric pressure conditions.
a smoke stream from a smoke generating tube is often used as a simple method of flow visualization in wind tunnels.
argon enters an insulated turbine operating at steady state at 1000 c and 2 mpa and exits at 350 kpa. the mass flow
assume the depth of water in the pvc pipe that you are using for the fish tank reservoir is two inches. a. compute the
assuming that the diameters of 1000 brass plugs taken consecutively from a machine form a normal distribution with
a solid shaft of 30mm diameter is to be used determine the maximum torque that can be applied without exceeding an
a 12-mm diameter jet of water discharges vertically into the atmosphere. due to surface tension the pressure inside the
A piston-cylinder arrangement holds a thermally perfect gas at p1=100kPa and T1 = 300K. Assume that cp = 1.0035 kJ/kg-K, cv = 0.7165 kJ/kg-K, and R = 0.287 kJ/
consider a large rain water tank for a remote farmhouse. the farmhouse occupants are constantly concerned with the
a closed cylindrical tank that is 6 ft in diameter and 26 ft long is completely filled with gasoline. the tank with its
oil viscosity 0.003 pa s specific gravity 0.85 is confined between two concentric circular cylinders of infinite
In order to increase production rate, a reactor setpoint was increased from 160 psig to 190 psig. The reactor pressure transmitter was recalibrated from 0- 200 psig to 0- 300 psig. What is the percent span for the old and new setpoints?
piston and flywheelconsider the one-cylinder four-stroke engine assembly shown in figure 1. the mass of the piston p is
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