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The electronic components of a computer are cooled by air flowing through a fan mounted at the inlet of the electronic enclosure. At steady state, air enters at 18oC, 1 atm. For noise control, the velocity of the entering air cannot exceed 0.9 m/s. For temperature control, the temperature of the air at the exit cannot exceed 34oC. The electronic components and fan receive, respectively, 68 W and 12 W of electric power. Determine the smallest fan area, in cm2, for which the limits on the entering air velocity and exit air temperature are met.
a man tried spinning a ball round and round in the air at the end of a unknown material its a rope like structure but
a pressure transducer behaves as a second-order system. if the undamped natural frequency is 10 khz and the damping is
the constant tensions of 200 n and 160 n are applied to the hoisting cable as shown. if the velocity v of the load is
a pistoncylinder arrangement is filled with helium gas. the gas is compressed with a polytropic process with nk. the
an air-standard dual cycle has a compression ratio of 9. at the beginning of compression p1100kpa t1300k and v114l. the
Calculate the change in velocity required in changing the position of a satellite in an orbit by 90 degrees. The initial and final orbit is circular around the Earth with a 15000 km radius. Calculate the delta velocity, semi-major axis and period for..
baseline validationdetermine the natural frequencies of the system. for the baseline system i get natural frequencies
estimate the drag of a thin square plate 3m by 4m when it is towed through water 10 oc. assume a towing speed of about
an office building where smoking is prohibited has 600 employees. the building is to be maintained at 78 db and 65 wb
a man dives horizontally and to the right off the end of a 220 kg boat. the boat is initially at rest and the man
a spring loaded device imparts an initial vertical velocity of 50 ms to a 0.15 kg ball. the drag force on the ball is
The magnetic flux that passes through one turn of a 12-turn coil of wire changes to 4.0 from 9.0 Wb in a time of 0.050 s. The average induced current in the coil is 230 A. What is the resistance of the wire?
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