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A proposed investment consists of constructing a building, purchasing production machinery, and operating for 20 years; its first cost is $250,000 with a salvage value $50,000. Since the maximum life of the machinery is 12 years, it will be necessary to renew the machinery once during the 20 years. The first cost of the machinery is $132,000 and its salvage value is $132,000/(age, years). The annual income is less the operating expense is expected to be $50,000. Annual interest is 6 percent compounded annually.
a. When is the most favorable time to replace the machinery?
b. Compute the present worth of the profit if the machinery is replaced at the time indicated by part (a).
A soft drink contains 39mg of sodium in 286g of .H2O What is the concentration of sodium in the soft drink in mass percent
Which one of the following substituents is deactivating and ortho-para directing in electrophilic aromatic substitution reactions. a. -Cl b. -CO2H c. -N(CH3)2 d. -CH=CH2
Describe the four quantum numbers, giving descriptions and allowable rules for each. Then show a set of allowable quantum numbers (any set) and a non-allowable set of quantum numbers
the standard enthalpy of formation of the metallocene bisbenzenechromium was measured in a calorimeter. it was found
When a 8.37-g mixture of methane, CH4, and ethane, C2H6, is burned in oxygen at constant pressure, 445.8 kJ of heat is liberated. What is the percentage by mass of CH4 in the mixture
advantages and disadvantages of using alternative fuel.there are many automobile industries exploring different types
Which of the following sets of quantum numbers or electron configurations cannot exist in a hydrogen atom? Why? a) n=2, l=2, m1=0 b) n=3, l=0, m1= -1 c)1p^3 d)3f^6
Presume that the anoxic fermentation of organic matter {CH2O} in water yields 15.0 L of CH4 at standard temperature and pressure. Explain how many grams of oxygen would be consumed by the toxic respiration of the same quantity of {CH2O}
blood alcohol content bac is often reported in weight-volume percent wv. for example a bac of 0.08 corresponds to 0.08
We did a lab where we added vanillin, acetic acid, potassium bromate and hydrobromic acid together. The product we got was analyzed to be 5-bromovanillin.
The root-mean-square (rms) speed of a sample of molecules was found to be 1.8*10^3 m/s at 25.0 degrees C. After heating, the rms speed was found to be 4.6*10^3 m/s. What was the temperature of the sample after heating
A student doing this experiment obtained a value of 110% for the recovery if copper. What is the possible explanation for this anomalous result
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