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Comment Re:Hilarious! (Score 1) 220

it is useful to be able to see that an answer is obviously wrong

In another place I was just discussing this very thing with someone; he insisted that process of elimination was cheating.

instead of doing a lot of math to see if the number is right, just take a few seconds to see if the units are right

Related skills - ballparking - high eighties times low nineties will be close to 8100, and last digit analysis - blahblah4 times yada3 must end in 2.

Comment Re:Will This Fight Ever End? (Score 1) 597

AC is great for long distance and certain applications. DC is great locally. The bridge rectifier should be between the grid & the home battery, not between the home battery and the devices it is recharging and/or powering.

The exception to this are high power home applications: Stove, Oven, Microwave, Toaster, Fridge, Dryer, Washing Machine, Dishwasher. The battery charger can be on the same circuit set.

Note that TV is NOT on this list. All video screens can be low power these days. All lighting can be low power. There is no reason why this can't be a simple 5V, 4A circuit with USB compatible plugs, several to a room.

Education

Chinese Nationals Accused of Taking SATs For Others 220

Vadim Makarov writes: Fifteen Chinese nationals living in the U.S. have been charged with creating an elaborate scheme to take U.S. college entrance exams on behalf of students. For the past four years, the accused provided counterfeit Chinese passports to impostors, who sneaked into testing centers where they took the Scholastic Aptitude Test (SAT), the Graduate Record Examination (GRE), and others, while claiming to be someone else, according to a federal grand jury indictment. Special Agent in Charge John Kelleghan for Homeland Security Investigations of Philadelphia said: "These students were not only cheating their way into the university, they were also cheating their way through our nation's immigration system."

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It's a naive, domestic operating system without any breeding, but I think you'll be amused by its presumption.

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