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An extension cord made of two wires of diameter 0.129 cm (no. 16 copper wire) and of length 2.4 m (8 ft ) is connected to an electric heater which draws 16.0 A on a 120-V line.How much power is dissipated?
The second cycle receives energy by heat transfer from the reservoir at temperature T and rejects energy by heat transfer to a higher- temperature reservoir at 1440 K. If the heat pump cycles have the same coefficient of performance, determine (a)..
A 17-tooth 20 normal pressure-angle helical pinion with a right-hand helix angle of 30 rotates at 1800 rev/min when transmitting 4 hp to a 52-tooth helical gear. The normal diametrical pitch is 10 teeth/in, the face width is 1.5 in, and the set has a..
a 100kg pure iron block at 27 degrees c is dropped into an insulated rigid tank that contains 0.1m3 of unused engine
a mixture of gases with an apparent molecular weight of 35 kgkilo-mol is flowing at 20 degrees celsius the manometer
A 2-D reducing bend (of unit width w) is shown below. Note that flow enters the bend at section 1 with a linear velocity profile, but at sections 2 and 3 is uniform. Find the velocity at section 3.
a sky diver with a mass of 70 kg jumps from an aircraft. the aerodynamic drag force acting on the sky diver is known to
A solar collector design consists of an inner tube enclosed concentrically in an outer tube that is transparent to solar radiation. The tubes are thin walled with inner and outer diameters of 0.10 and 0.15 m, respectively.
A cylindrical steam boiler shell is riveted in construction; it is made from plates 18mm thick, and has a diameter of 1.8m, Calculate the circumferential and longitudinal stresses in the plates when the internal pressure is 800 kN/m2 if the ultimate ..
This shows that the equation ∇T = (δT/δx)e1→+(δT/δy)e2→ cannot be used as the analytical definition of the gradient because it gives different results in different coordinate systems
an ideal gas is heated from 50 c to 80 c a at constant volume and b at constant pressure. for which case do you think
an iron-carbon alloy gear is being hardened by carburization at 1000 oc. calculate the time in hours necessary to
A rooftop solar hot water heater with collector areas of 8 m2 and storage of 640 L is installed in Phoenix, Arizona on a house that uses 160 L/day of hot water at 60°C. 70% of the total energy required is supplied by solar energy (the solar fraction ..
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