A steel railroad bridge uses a zinc sacrificial anode to
A steel railroad bridge uses a zinc sacrificial anode to limit the extent of oxidation of the steel. If a 5.1 kg anode is completely ozidized to Zn2+ over the course of 15.5 years, compute the average current flowing through the anode.
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A decision maker wishe to minimize the cost of producing a given level of total benefit, B = 288. The cost function is C = 6x + 3y and the total benefit is B = xy. Set up the Lagrangian adn then determine the levels of x and y at the minimum level
Suppose a 5-volt battery is delivering a steady current of 5 A for a period of 4 hours. Calculate the total charge in coulombs that passes through this circuit.
In a perfectly competitive market suppose that a competitive firm's marginal cost of producing output q is given by MC(q)=3+2q. Assume that the market price of the product is $9.
Yolanda owns an art factory in Palermo, Italy. She is thinking of expanding her exports of large-size paintings of Italian cityscapes. She has had little difficulty recruiting new artists to Palermo to work a 40-hour week in the factory.
The Solis Company has estimated the demand curve for its product is represented by the equation: where is the quantity sold per year and is the price per unit. (a) Based on the estimated demand curve, write the equations for Solis'.
Someday, cars may be powered by clean H2/O2 fuel cells and electric motors. Under standard conditions, such a fuel cell can develop 1.229 volts. If the oxygen is obtained from air (at P=0.21 bar), what pressure of H2 would be required to develop 1
Calculate the point price elasticity of demand and point income elasticity for peaches at the equilibrium. Also calculate the point cross price elasticity between peaches and apricots at the equilibrium.
In 2006, U.S. output was $13.2 trillion, and Chinese output was $2.8 trillion. Suppose that from now on, the output of China grows at an annual rate of 8.8% per year (roughly what it has done during the past decade)
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