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A saxophone is playing a steady note of frequency 266 Hz. The temperature in the room is 25° C. Suppose that at some instant the varying pressure at your eardrum is at a maximum. How far away in meters is the next pressure maximum?
i) statement on pressure maximum
Calculate the depth a diver should not exceed if breathing Nitrox II to avoid oxygen toxicity. Show your working clearly, and state any assumptions that you make
consider a carnot cycle for water in a piston-cylinder device. the mass of the water is 1.5 kg. during the isothermal
The experimental Nyquist circle of a structure is shown in Fig. 10.47. Estimate the modal damping ratio corresponding to this circle.
the plank cde has a mass m15kg and is rest on a small pivot at d. a block a of mass 55 kg is resting on point c. a
a system executes a power cycle while receiving 1050 kj by heat transfer at a temperature of 525 k and discharging 700
Air at 60° F and 40 psia is flowing in a 4" diameter pipe at 0.2 slugs/sec. The pipe undergoes a conversion to a 2" by 3" rectangular duct in which T = 150°F and P = 7 psia. Calculate the average velocity in each section.
a simple ideal brayton cycle with air as the working fluid has a pressure ratio of 11. the air then enters the
Transform the stresses in Flamant's solution into polar coordinates, or in other words, derive expressions for the stress components σrr, σθθ and σrθ. Note that the result is rather specia.
assume that the flow of air through a given duct is isentropic. at one point in the duct the pressure and temperature
A common approach to system testing is to test the system until the testing budget is exhausted and then deliver the system to customers. Discuss the ethics of this approach for systems that are delivered to external customers.
a 0.75 m3 tank contains nitrogen at 150kpa and 40degc. 2.0 kg of oxygen are added to the tank. what is the final
An ideal vapor-compression refrigeration system operates at steady state with Refrigerant 134a as the working fluid. Superheated vapor enters the compressor at 30 lbf/in2, 20F, and saturated liquid leaves the condenser at 140 lbf/in2. The refriger..
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