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A supermarket sells kilogram bags of pears. The numbers of pears in 21 bags were:
(a) Find the mode, median and mean for these data.
(b) Compare your results and comment on the likely shape of the distribution.
(c) Plot a simple bar chart to portray the data.
If the generated emfs are 200 and 210 V, respectively, determine the load voltage and the armature current of each machine.
If a mixture of 5.0 g of hydrogen and 10. g of methane is burned, and the heat released is transferred to 50.0 g of water at 25.0C, what final temperature will be reached by the water?
A horizontal rod 5 mm in diameter is immersed in water maintained at 18°C. If the rod surface temperature is 56°C, estimate the free convection heat transfer rate per unit length of the rod.
Calculate the tower diameter and packing height and calculate NTU - Ammonia in air being absorbed by a pure water stream in a packed tower.
If the liquid density is 50 lb/ft3 and the gas density is 0.10 lb/ft3, estimate the pressure drop per tray as pounds force per square inch.
Explain how heat is lost from a hot surface to the surrounding air - what is meant by the economic thickness of lagging?
Based on this brief description of the Head Master, draw a block diagram of how this device might work and the basic components that might be needed in the Head Master. Include in your block diagram the ultrasonic signal source, detectors, timers,..
Determine the electromagnetic force on the plunger by the application of Equations (12.4.19) and (12.4.20). Interpret the significance of the sign that you obtain in the force expression.
A hydrocarbon liquid fuel (containing only C and H2) is burnt in air which produces a flue gas which analyses ( orsat analysis ) on dry basis as CO2 =10.5% , O2 = 5% and N2 =84.5%.
A plant has a batch of 100 kmol of a liquid mixture containing 20 mol% benzene and 80 mol% chlorobenzene. It is desired to rectify this mixture at 1 atm to obtain bottoms containing only 0.1 mol% benzene. The relative volatility may be assumed con..
A geometrically similar 200 pump having a similar efficiency curve is used to pump water through 112.5 m of 150 mm pipe, f = 0.025. The static lift is 10 m. Neglecting minor losses in the pipe calculate the flow, head and power required to drive t..
Derive an expression similar to Eq. (56) for finding the optimum exit temperature of cooling water from a heat exchanger when the temperature of the material being cooled is not constant.
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