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anorlunda's Recent Activity

  1. anorlunda liked Boing3000's post in the thread B How to shorten this speech about BH?.

    The two latest video of spactime are exactly on that topic. But you'll need time dilatation to fit that in 3 minutes :wink:

    Jun 22, 2018 at 5:51 AM
  2. anorlunda replied to the thread B How to shorten this speech about BH?.

    That makes it more complex, not less. Visual aids need explanation. I think you're trying to pack a 30 minute talk into 3 minutes. At...

    Jun 21, 2018 at 3:11 PM
  3. anorlunda liked jim hardy's post in the thread Length of time needed to measure digital clock accuracy.

    You know of the old timekeeper at the factory in a small Midwest town . He blew the factory's lunch whistle every day precisely at...

    Jun 21, 2018 at 9:34 AM
  4. anorlunda replied to the thread Length of time needed to measure digital clock accuracy.

    Don't forget that crystal based digital clocks are also sensitive to temperature and atmospheric pressure, and possibly other factors....

    Jun 21, 2018 at 9:12 AM
  5. anorlunda replied to the thread Length of time needed to measure digital clock accuracy.

    In your OP, you told what you said to New Holland, but not what they said. The accuracy of a digital clock depends on the frequency of...

    Jun 21, 2018 at 8:55 AM
  6. anorlunda liked jrmichler's post in the thread I Looking for a cheap digital scale with accuracy <1 g.

    Check out powder scales. They are designed for weighing gun powder, so read out in grains (7000 grains = 1 lb = 454 grams). Typical...

    Jun 21, 2018 at 8:20 AM
  7. anorlunda liked Greg Bernhardt's post in the thread Insights How to Better Define Information in Physics - Comments.

    Wonderful article @anorlunda, a must read!

    Jun 21, 2018 at 7:34 AM
  8. anorlunda liked fresh_42's post in the thread Insights How to Better Define Information in Physics - Comments.

    Nice essay. Another Insight article that made it on my list of standard references.

    Jun 21, 2018 at 7:34 AM
  9. anorlunda replied to the thread B What does it sound like inside a pulsar?.

    Take any ordinary radio. Tune it so that it hears no station at all. The hiss and static you hear has been called "the sound of the...

    Jun 21, 2018 at 5:56 AM
  10. Greg Bernhardt posted a new thread.

    Insights How to Better Define Information in Physics - Comments

    Greg Bernhardt submitted a new PF Insights post How to Better Define Information in Physics [ATTACH] Continue reading the Original PF...

    information_definition.png

    Forum: General Physics

    Jun 20, 2018 at 4:08 PM
  11. anorlunda replied to the thread Making a safe and effective fly zapper.

    But that ignores what I said about short circuit. To get a short circuit, something has to be wrong, or something fails, or something...

    Jun 20, 2018 at 3:33 PM
  12. anorlunda replied to the thread Making a safe and effective fly zapper.

    Ah, thanks. Nope, not true. It is not just voltage, but also the energy that can be delivered in a short circuit pulse. Have you...

    Jun 20, 2018 at 3:18 PM
  13. anorlunda attached a file to the thread Making a safe and effective fly zapper.

    If those tennis racket bug zappers do it with a 9V battery, why can't you do it with a 9V wall wart? That would get rid of many of the...

    20180513115430_470x.jpg Jun 20, 2018 at 2:38 PM