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The revenue (in £) from newspaper sales at a new service station for the morning, afternoon and evening periods of the first three days of operation are:
(a) Construct a time series chart and examine it for evidence of a trend and recurring components for parts of the day.
(b) Calculate three-point moving averages for the series and plot them on the chart.
The two hoops are kept parallel to each other and rotate at 600 rpm in a constant magnetic field as shown in Figure 10.41. Calculate the potential difference between the two hoops.
Let p be the price of output, and let the factor prices be fixed. If p = 2 how much will the firm produce? If p = 1 how much will the firm produce? What is the profit function of this firm?
Assuming the analyses are accurate, what do they show about the ratio by weight of each of the three fractions actually obtained? What is the overall effectiveness of each screen?
The ship must unload 1000 metric tons within 5 hours to avoid demurrage charges. Estimate the power required by the pump. Take the pump efficiency as 70%. Physical properties of toluene: density 874 kg/m3, viscosity 0.62 mNm-2
For the electromagnet shown in Figure P12.4.3, the λ-i relationship for the normal working range is given by i = aλ2 + bλ(x - d)2, where a and b are constants. Determine the force applied to the plunger by the electric system.
What are the units commonly used in occupational exposure limits for quantifying the concentration of dust particles, vapours or gases and fibres? What does LD 50 mean in Industrial Toxicology
How do the ratios determined in parts (a) and (b) compare? What does this tell you about which range may have more areas of practical application?
Assume a 10 °F temperature between streams in the heat exchangers and a compressor efficiency of 80%.
A standard vapor compression cycle uses tetrafluoroethane as the refrigerant. The refrigerant at the exit of the condenser is saturated liquid at 90 °F; at the exit of the evaporator it is saturated vapor at 0 °F. The cycle is powered by a compres..
Zirconium is one of the few metals that retains its structural integrity upon exposure to radiation. The fuel rods in most nuclear reactors therefore are often made of zirconium.
A loaded semi-truck consumes about 10 US gallons of diesel per hour (assuming an average speed of 60 mph) and is driven about 16 hours per day, every day of the year. The density of diesel id 0.85 kg/liter. If 1 barrel of crude oil produces 10..
Assume that the absorption coefficient is 0:1 cm-1, the scattering coefficient of a 5-cm thick tissue is 100 cm-1, the scattering anisotropy is 0.9, and the wavelength of light is 0:5 mm. Calculate the light fluence rate 5 cm from the source.
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