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Question: A moving piston forces air from a well-insulated 15-cm-diameter pipe through a convergent nozzle fitted to the end of the pipe. The nozzle has an exit diameter of 4 mm and the air is discharged to the atmosphere. If the force on the piston is 3700 N and the air temperature is 30°C, estimate the velocity on the nozzle exit plane, the piston velocity, and the mass flow rate at which the air is discharged from the nozzle.
Suppose interest rates have risen lately and the proportion of executives with retirement investment money in the bond market may have dropped. To test this idea, a researcher randomly samples 210 exec- utives who have retirement funds. Of these, ..
an automobile is modeled as a single-degree-of-freedom system vibrating in the vertical direction. it is driven along a
A piston/cylinder system contains superheated vapor initially at 400C and 600 kPa. The system is cooled at constant pressure by exchanging heat to the surroundings until the cylinder contains only saturated liquid. The surroundings are at 25C.
consider an ideal vapor-compression refrigeration cycle. the refrigerator employs refrigerant 134a as the working fluid
a pressized tank contains a fluid with a dinsity of 900 kgm3. the absolute pressure of the air above the fluid is p400
you are to select a refrigerator for frozen food processing facility. the freezing of the food requires a heat rate of
Consider a situation where a jump forms 3.0 in. from the center of the plate with depths upstream and downstream of the jump of 0.05 in. and 0.20 in., respectively. Determine the flowrate from the faucet.
Given the planar velocity field vr = -A sin(?t) sin θ r 2 vθ = A sin(?t) cos θ r 2 , where A and ? are known constants, 1. Determine the vorticity.
Estimate the top-height settings along the test section from x = 0 at section CD to x = 254 mm at section © downstream.
hot air at atmospheric pressure and 80oc enters an 8-m long un-insulated square duct of crosssection 0.2mx0.2m and
What is the minimum coefficient of road adhesion needed to achieve this acceleration? (Assume m = 1.00.)
heat is transferred steadily to boiling water in a pan through its flat bottom at a rate of 650 w. if the temperature
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