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Which one is the main output of a power flow analysis?

What kind of power system faults are most common? 

A radio contest in your town is giving away two free concert tickets, your roommate calls in and wins the tickets and invites you to the concert. You tell your roommate you are working the day of the concert, to which your roommate replies, call in sick this is a great concert. The concert is in a different city 3 hours away. Your work pays you $12.50 an hour. Your roommate is off that day and was planning on playing video games all day. What is your opportunity cost if you decide to attend the concert, assuming you work 8 hours that day? What is the opportunity cost of your roommate? 

For a medium line, VS=458kVLL, and line parameters are as follows: A=D=0.952

Are the cross-price elasticities of demand between the following pairs of products likely to be positive or negative? Briefly explain. Iced coffee and iced tea French fries and ketchup Steak and chicken Blu-ray players and Blu-ray discs

For the following set of unbalanced 3-phase current, what is the magnitude of the approximate zero-sequence current?$$I_a=20\angle 40^{\circ}$$$$I_b=18\angle -80^{\circ}$$$$I_a=25\angle 170^{\circ}$$

In a single phase system, load needs constant 200W real power at a lagging power factor of 0.8. How much reactive power is required to improve the pf to 0.95?

Which generator reactance is generally the smallest?

For what type of fault, all sequence fault currents are equal?

A balanced 60Hz  Delta connected load has R=5ohms and L=10mH in series per-phase. What is the impedance of the equivalent Wye connected load?