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Cartina Technologies make digital cameras. The cost of manufacture per unit at their factory in £, y, is related to output per hour, x, in line with the equation:
(a) How many cameras should be made per hour if they are to minimize the cost per camera?
(b) Determine the second derivative and use it to confirm that the cost equation will be at a minimum when this many cameras are produced.
(c) Calculate the minimum cost per camera.
A 60-Hz, 440-V, three-phase system feeds two balanced wye-connected loads in parallel. One load has a per-phase impedance of 8 + j3 Ω and the other 4 - j1 Ω.
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Calculate the ratio of the network over the amount of heat absorbed at the high temperature of the cycle. How does this value compare to the theoretical efficiency of the Carnot cycle that is calculated based on the two operating temperatures?
A vapor mixture of carbon dioxide/cyclohexane is to be separated by partial condensation in a vapor- liquid separator at 250 K so that carbon dioxide is received at a purity of 80%. Determine the pressure and the mole fraction of CO2 in the liqu..
The armature terminal voltage is halved, with the field current and load torque remaining the same. (c) The field current and the armature terminal voltage are halved, with the horsepower output remaining the same.
What are Denbigh reactions? Explain its specialcases.?Denbigh (1958) was the first to treatthe following rather general reaction schemeA1R3S-rA= k12CArR= k1CA - k34CRrS= k3CR24rT= k2CArU= k4CATUk12= k1+ k2k34= k3+ k4With CAo+ CRo+ CSo+ CTo+ CUo= C..
When the generators supply a battery of emf 300 V and resistance of 1.5 Ω.
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