MATERIALS SCI + ENGR: INT W/ACCESS
10th Edition
ISBN: 9781119808084
Author: Callister
Publisher: WILEY
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An elastic cord is stretched between 2 points A and B located 2y = 0.8 m apart in the horizontal
plane. When stretched directly between A and B, the tension is P₂ = 40 N. The cord is then stretched as shown
until its midpoint C has moved through x = 0.3 m to C', and a force of F = 240 N is required to hold the cord at
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2. A three-phase transformer connection Yy, 2000 kVA, 20000/6000 V has the relative short-circuit voltages Ecc = 7% and ERcc = 1.7%.It is known that when empty this transformer consumes a power Po = 12.24 kW.
Calculate:a. Parameters Zcc, Rcc, Xcc, referring to the primary and EXcc.b. If the transformer is connected at rated voltage and feeds a load of 1800 kVA, fp = 0.8, calculate the line voltage at the secondary.c. The maximum apparent power, and the maximum efficiency fp = 0.8 inductive.
solve WITHOUT using artificial intelligence.Solve by hand by one of the EXPERTS please
Design a fuel cell stack for a fuel cell bus to operate at 200V and provides 100 HP, (1HP = 750 W). Assume the optimum current density on fuel cell electrode at 1 A/cm2. Thickness of each cell is 0.5cm, and nominal cell voltage is 1V.
Calculate the power density of the fuel cell stack.
Calculate the voltage drop of the fuel cell stack at 150A if the cell resistance is 2mW.
Calculate the required hydrogen fuel (in kg) if the fuel cell operates continuously for 5-hours with 100HP.
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