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Pianni Beverages produce two ready-mixed cocktail drinks; the Zombie and the Skyjack. Each is a mixture of vodka, vermouth and ginger. It takes 3 litres of vodka, 6 litres of vermouth and 1 litre of ginger to make 10 litres of Zombie, and 5 litres of vodka, 3 litres of vermouth and 2 litres of ginger to make 10 litres of Skyjack. The company makes £15 profit per 10 litres of Zombie and £20 profit per 10 litres of Skyjack. The maximum available supplies per day are: 1500 litres of vodka, 1500 litres of vermouth and 400 litres of ginger. How much of each cocktail should be made to maximize profit per day, and what is the maximum profit per day it can make?
The volumetric flow rate and solute concentration of stream 2, q2 and c2, vary with time, while those of stream 1 are constant.
A gas stream contains 18.0mole% hexane and the remainder nitrogen, the stream flows to a condenser, where its temperature is reduced and some of the hexane is liquefied.
Following a procedure analogous to that in Example 5.2, obtain an expression for the coefficient of thermal expansion based on the van der Waals equation of state. Use the result to calculate the value of β for oxygen at 20 °C, 30 bar.
A fluid level control system includes a tank, a level sensor, a fluid source, and an actuator to control fluid inflow. Consult any classical control text1 to obtain a block diagram of an analog fluid control system. Modify the block diagram to sho..
Calculate the net present value of each options using a discount rate of 12%.
The gas flow rate is 4000 kg/hr.sqm of air and the water entering is 6250 kg/hr.sqm. For this system, Henry's law holds good and y = 1.75 x, where y is the mole fraction of acetone in the gas in equilibrium with a mole fraction x in the liquid. Ho..
A three-phase, 60-Hz substation bus supplies two wye-connected loads that are connected in parallel through a three-phase feeder that has a per phase impedance of 0.5 + j2 Ω. Load 1 draws 50 kW at 0.866 lagging PF, and load 2 draws 36 kVA at 0.9 l..
A 100-turn coil in the configuration of Figure P12.1.3 is rotated at a constant speed of 1200 r/min in a magnetic field. The rms induced voltage across the coil is 1 kV, and each turn has a length l = 112.5 cm and a width w = 10 cm. Determine the ..
Neglecting stator resistance, leakage reactance, and all losses, if the stator-to-rotor turns ratio is 2:1 and the applied voltage is 100 V, find the rotor-induced emf at standstill and at 0.05 slip.
Determine the current I through the 10-Ω resistor of the circuit of Figure P2.2.5 by employing the node-voltage method. Check by mesh analysis.
A3m3 tank is divided into two parts via a thermally insulated wall. One part has a volume of 2 m3 and contains a vapor-liquid mixture of steam, 7% liquid, at 5 bar. The other part contains steam at 10 bar, 500 °C. A valve is opened and allows th..
A shell and tube heat exchanger is to be used in a corrosive service. If carbon steel tubes are used, the cost of the exchanger is estimated to be $160,000, and it is expected that the exchanger will need to be replaced after two years.
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