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daily 05/14/2013

    • For example, any top capo that is anybody will have his 45 pistol or AK-47 gold plated with his insignia on it.
    • The largest of electric motors are used for ship propulsion, pipeline compression and pumped-storage applications with ratings approaching a megawatt. Electric motors may be classified by electric power source type, internal construction, application, type of motion output, and so on.
    • A circular saw makes more noise because of the type of motor it uses. The circular saw has a universal motor in it, and this type of motor is extremely noisy.

      Universal motors are called “universal” because they are happy to run either off of AC or DC electric power. Circular saws use brush-type universal motors. Vacuum cleaners, routers and electric drills also use universal motors. These motors produce so much noise because the brushes rub on the slotted armature. In circular saws and drills, you also have gear train noise.

      Something like a radial arm saw or a table saw uses an induction motor instead. Induction motors run only on AC power and do not use brushes — that is the main reason they are so quiet. They also run slower and usually use a belt drive instead of a gear train.

    • a 3/4 Hp induction motor runs at 1075 – 3450 RPM, is about 6″ long x 6″ diameter and weighs about 19 pounds. If we compare this with a universal motor with 3/4 horsepower output, we see a speed increase of about 15,000 RPM, a size reduction to about 6″ long x 3″ diameter {1/4 of the volume} and a weight reduction of greater than 85%.
    • The armature is an electromagnet made by coiling thin wire around two or more poles of a metal core.
    • The north end of the electromagnet would be repelled from the north end of the horseshoe magnet and attracted to the south end of the horseshoe magnet. The south end of the electromagnet would be repelled in a similar way. The nail would move about half a turn and then stop in the position shown.
    • The key to an electric motor is to then go one step further so that, at the moment that this half-turn of motion completes, the field of the electromagnet flips.
    • The armature in this motor is a set of thin metal plates stacked together, with thin copper wire coiled around each of the three poles of the armature
    • nside an electric motor, these attracting and repelling forces create rotational motion.
    • Woods hit his tee shot into the trees left of the fairway, and waded into the throng of fans to size up his options.
    • We can debate whether the crowd cheer actually affected the shot (though it sounds like it happens well after he strikes the ball) or follow through, but there is absolutely no denying that Sergio Garcia blames Tiger Woods for his poor shot and subsequent finish.
    • I mean, come on Sergio. It’s one thing to use a feud to psych yourself up and push yourself. But this is so lame: I might have hit it…you never know.
    • “Well, the marshals, they told me he already hit,” Woods said. “So I pulled a club and was getting ready to play my shot, and then I hear his comments afterwards and not real surprising that he’s complaining about something.”
  • Sleeping in her favorite spot! http://t.co/RE8OwwUb59

    • “There’s very good evidence” that high-intensity interval training provides “many of the fitness benefits of prolonged endurance training but in much less time,” says Chris Jordan, the director of exercise physiology at the Human Performance Institute in Orlando, Fla., and co-author of the new article.
    • Work by scientists at McMaster University in Hamilton, Ontario, and other institutions shows, for instance, that even a few minutes of training at an intensity approaching your maximum capacity produces molecular changes within muscles comparable to those of several hours of running or bike riding.
    • . But even more, he says, it’s accomplished by alternating an exercise that emphasizes the large muscles in the upper body with those in the lower body. During the intermezzo, the unexercised muscles have a moment to, metaphorically, catch their breath, which makes the order of the exercises important.
    • The exercises should be performed in rapid succession, allowing 30 seconds for each, while, throughout, the intensity hovers at about an 8 on a discomfort scale of 1 to 10, Mr. Jordan says. Those seven minutes should be, in a word, unpleasant. The upside is, after seven minutes, you’re done.
    • The amusement park was closed by Imperial Order; the Emperor of the Cosmos had gone missing. The Doctor flashed his bona fides, and the Captain greeted him: “Hello, Proconsul!”

Posted from Diigo. The rest of my favorite links are here.

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