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  2. How to Clean a Shower Head (And Why You Really Need To) - AOL

    www.aol.com/lifestyle/clean-shower-head-why...

    Before you do, “wrap plumber’s tape around the shower arm entrance to create a tight seal and use a wrench to reattach the shower head to the shower arm,” says Peterson. “Use a rag to ...

  3. Failure of electronic components - Wikipedia

    en.wikipedia.org/wiki/Failure_of_electronic...

    A sudden fail-open fault can cause multiple secondary failures if it is fast and the circuit contains an inductance; this causes large voltage spikes, which may exceed 500 volts. A broken metallisation on a chip may thus cause secondary overvoltage damage. [1]

  4. Failure rate - Wikipedia

    en.wikipedia.org/wiki/Failure_rate

    Suppose it is desired to estimate the failure rate of a certain component. Ten identical components are each tested until they either fail or reach 1,000 hours, at which time the test is terminated. A total of 7,502 component-hours of testing is performed, and 6 failures are recorded. The estimated failure rate is:

  5. Shower - Wikipedia

    en.wikipedia.org/wiki/Shower

    A shower head is a perforated nozzle that distributes water over solid angle a focal point of use, generally overhead the bather. A shower uses less water than a full immersion in a bath. Some shower heads can be adjusted to spray different patterns of water, such as massage, gentle spray, strong spray, and intermittent pulse or combination modes.

  6. What NOT to Do in the Shower - AOL

    www.aol.com/15-things-never-shower-121200439.html

    4. Turn Up the Hot Water. There’s nothing quite like a long, hot shower for a little relaxation and stress relief, but think twice if you want to keep your skin in tip-top condition.

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  8. Are hot showers bad for your skin? Experts weigh in - AOL

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  9. Fail-safe - Wikipedia

    en.wikipedia.org/wiki/Fail-safe

    If the arresting wires fail to capture the aircraft, it is able to take off again; this is an example of fail-safe practice. [10] In railway signalling signals which are not in active use for a train are required to be kept in the 'danger' position. The default position of every controlled absolute signal is therefore "danger", and therefore a ...