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A manufacturer of storage bins, with a budget of $10,000,plans to produce some open -top rectangular boxes with squarebases.The volume of each box is to be 125 cubic feet.Material forthe base costs $ 4 per square foot, and material for the sidescosts $2 per square foot.
Determine the dimensions of the box that will minimise thecosts of materials.Based on material costs alone,how many bins canthe manufacturer produce?
Suppose that the costs are expected to go up to $6 per squarefoot (base) and $4 per square foot (sides), by the end of theyear.How many bins can the manufacturer now produce if she stillwishes to minimze material costs?
Heat is transferred to the water such that the temperature in the tank remains constant. Determine the amount of heat that must be transferred by the time one half of the total mass has been withdrawn.
Determine an appropriate pipe diameter and slope for this reach, and establish the pipe invert elevations at the upper and lower manholes. Assume that a minimum earth cover of 2 m above the pipe crown is required.
For each of the two cases below, determine the water pressure, pressure head, elevation head, and total head at points A, B, and C. Please solve the problem using: (a) the upper reservoir level as the datum
Elongation (in %) of steel plates treated with aluminium are random with probability density function f(x)={x/250 20
Determine the reduction of capillary rise if the contact angle representing the adhesion between water and soilmaterial is increased from 30 degrees to 60degrees.
Steam at 100 bars and 550°C enters a turbine operating in steady-state with a volumetric flow rate of 460 m^3/min. 22% of the entering mass flow exits the turbine at 10 bars, 200°C and a velocity of 20 m/s.
Consider CO2 emissions from a gasoline powered vehicle. Gasoline is acomplex mixture of hydrocarbons but for the purposes of this calculation assume an average molecular formula of C7H16.
A hospital waste containing 0.7µCi/L of 32P is to be disposed of. How long must the radioisotope be held to meet the allowable discharge activity
Determine the settlements when a stress of 100 kPa is applied by the building over an area of 10m × 5 m on the soil surface.
a temporary diversion has been constructed on a highway due to major repairs thatnbspare being undertaken on a bridge.
You try to freeze one liter of water at 10 degrees Celsius in ice trays in your freezer. Your freezer has a coefficient of performance of 5.5 and a power rating of 550 Watts, though only 10% of the power will go into freezing the ice.
Ethyl acetate is made from acetic acid and ethyl alcohol. Let x = pounds of acetic acid input, y=pounds of ethyl acohol input, and z = pounds of ethyl acetate output. The relationship of output to input is: z^2/(1.47x - z)(1.91y - z) = 3.9.
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