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A plant hire company purchases a mobile crane for £120,000. It plans to charge £190 a day for hiring out the crane. For each day on which it is hired out the company expects to incur variable costs of £40.
(a) Work out how many days the company needs to hire out the crane in order to break even.
(b) If the variable costs are actually £55 and the hire charge has to be reduced to £180 per day, what is the new breakeven point?
The specification for a sieve plate column is given below. Make a preliminary mechanical design for the column. Your design should include:
If the maximum allowable board temperature is 77°C, what is the maximum allowable power dissipation per board?
what horsepower motor will be required?
Let both the actuator and the sensor signals be in the range 0 to 5 V, and let 1C of the temperature variable correspond to 0.02 V. Design the hardware and software architecture of the digital control system.
Develop the designed circuit using breadboard in the laboratory and discuss the effect of resistors on calibration of the sensor with specific emphasis on the sensitivity of the instrument.
What is the concentration of the original hydrochloric acid solution? Also, what volume of 0.0200 M calcium hydroxide is required to neutralize 35.00 mL of 0.0500 M nitric acid? Explain your answer in detail.
A solution with composition x1 = 0.2 is to be stored at 250 K. It is important to avoid the formation of vapor. What is the minimum pressure required?
An eight-liter pressure cooker contains a mixture of steam and liquid water at 2 bar. Through a level indicator we can see that the liquid occupies 25% of the volume inside the cooker.
In Figure 9.84, calculate the force that exists between the two faces of the gap. The magnetic path has a permeability equal to μ and the core is d m thick. a, b, and g are the average path lengths of the corresponding magnetic path sections.
In the manufacture of methyl ethyl ketone from butanol, the product is separated from unreacted butanol by distillation. The feed to the column consists of a mixture of 0.90 mol fraction MEK, 0.10 mol fraction 2-butanol, with a trace of trichloroe..
The resting potential of the membrane is 52 mV at room temperature. Find the Kþ cytoplasm concentration.
In Bertrand competition firms decide independently what prices to set to maximizetheir individual profits. Suppose that there are two firms in a market sellingthe same product. Let D(p) = 9 - p be the market demand and let c1 = 1 andc2 = 7 be firm 1 ..
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