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Question: Air flows down an adiabatic constant area circular pipe that has a diameter of 1.5 cm. At the inlet to the pipe, the Mach number is 0.16. Determine the pipe lengths that would give exit Mach numbers of 0.56 and 1. Assume that the friction factor, f, is 0.004. If the stagnation conditions at the inlet to the pipe are maintained at the same values, find the percentage change in the flow rate through the pipe for the two cases considered if the length of the pipe is increased by 1 m.
It is claimed that a refrigerator requiring 400 W of power (W) receives heat from cold storage (low temperature source, TL) at 200 K and rejects heat at the rate of 600 W (QH) to an environment at 600 K (high temperature reservoir, TH). Calculate the..
A TMD is a device consisting of a mass, a spring, and a damper that is attached to a structure in order to reduce the dynamic response of the structure. The frequency of the TMD is tuned to a particular structural frequency so that when that frequ..
The steady state operation for a simple steam power plant with a mass flow rate of 1 kg/s is shown in the figure. Determine 1) the thermal efficiency of the process and 2) mass flow rate of cooling water in kg/s (assume condenser is well insulated)
Calculate the resulting uncertainty in ωn al L =1.0 and L =4.0 in - What is the frequency of the signal? In order to properly sample and reproduce the characterstics of the signal in digital form, what should be the minimum sampling frequency and w..
A golf ball is driven off a tee that is elevated 30 ft above the fairway and hits the ground that is below 30 ft from the tee. The initial velocity of the ball is 120 ft/s at an angle of 40 degrees from the horizontal.
It is desired to create a hydroelectric dam in South Carolina that will produce 1,000 kW of power. Knowing that the flow of the water through the dam can be 400 gal/s, what is minimum allowable height of the dam required to achieve the power goal?
consider a steam pipe of length l 9 m inner radius r1 5 cm outer radius r2 6 cm and thermal conductivity k 12.5
A tensile test was conducted on a mild steel bar. The following data was obtain from the testi. Dia of the steel bar= 3 cmii. Gauge length of the bar = 20cmiii. Load at elastic limit=250kNiiii. Extension at a load of 150 kN= .21mmv. Minimum load =380..
the diameter of the hollow core of a solid propellant grain remains axially uniform during burning. its length is 5 m
A 3-inch diameter orifice cut in a thin orifice plate conveys flow from a deten- tion basin with water level at elevation 472.00 feet. The center of the orifice is at elevation 467.50 feet. Find the discharge for free flow.
A particle which movies in a two-dimensional curvilinear motion has coordinates in millimetres which vary with time t in seconds according to x=5t2 +4 and y=2t3 + 6. For time t =3s, determine the radius of curvature of the particle path and the magni..
What conclusion do you draw with respect to the relative desirability of designing machines with column members loaded in tension versus loaded in compression?
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