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A 2-mm-diameter meteor of specific gravity 2.9 has a speed of 6 km/s at an altitude of 50,000 m where the air density is 1.03 × 10-3 kg/m3. If the drag coefficient at this large Mach number condition is 1.5, determine the deceleration of the meteor.
a machine with a rotating shaft has a total weight of 90 kg and is supported by springs. the damping constant for the
Explain why Boehm's spiral model is an adaptable model that can support both change avoidance and change tolerance activities. In practice, this model has not been widely used. Suggest why this might be the case.
Verify that the exact solution from Prob. P4.80 is consistent with your result in part (a).
the pressure inside the cylinders of a diesel engine reaches a maximum pressure of 100atm during combustion. the
Air enters an adiabatic nozzle at 5.18 MPa and 400K with a velocity of 20 m/s. The air exits at 2.00MPa. Determine the maximum exit velocity for this nozzle.
Determine displacement (in) of a 1.08 in diameter steel bar, which is 834 ft long under a force of 33,222 lb if elasticity modulus is 30 x 106 psi. Make sure you do not round up your answer to less than 4 significant (non-zero) figures.
determine the frequency response and m omega and phiv omega for an instrument having a time constant of 10 ms.
nitrogen at 80 kpa and 400 k enters an adiabatic diffuser steadily at a flow rate of 6000 kgh at 230 ms and leaves at
a steel cylinder initially contains nitrogen gas at 200kpa and 25 c. the cylinder is connected to a suply line
Determine the required length L of each splice if a factor of safety is 2.75.
an axial turbine of high hub-tip ratio runs with zero degree reaction and peak efficiency at design flow and speed. the
the pump is delivering hydraulic oil with a specific gravity of 0.85 at a rate of 20 gallons per minute. the pressure
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