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  1. CircutScoper

    Change timing period to gadget ?

    Well, you could take the "shotgun" approach and, since the beeping period is probably controlled by an RC timeconstant, increase all the capacitances by a factor of 120.
  2. CircutScoper

    Potential energy of suspended mass expressed in kWh

    Turns out, that experiment (or one very similar to it) was actually done and the results published in 1798. Heat is a Form of Motion: An Experiment in Boring Cannon Benjamin Thompson (Count Rumford) Philosophical Transactions (vol. 88), 1798...
  3. CircutScoper

    Potential energy of suspended mass expressed in kWh

    Notice anything funny in those "historic" definitions? Like wondering why, when the metric system was defined in 1799, the Académie des sciences even cared how long the solar day would be 101 years later? And the two definitions given for the mole are actually reciprocals of each other.
  4. CircutScoper

    Potential energy of suspended mass expressed in kWh

    I think I rather leave that to a horse, then the job oould be done in ~36 seconds -- give or take.
  5. CircutScoper

    Potential energy of suspended mass expressed in kWh

    It mattered to Galileo, because the reason for the difference is the interesting (to some) fact that the Earth orbits the Sun rather than the other way 'round. Yakking about it almost got him burned at the stake. And I thought you said you get interested when "values relate to natural...
  6. CircutScoper

    Potential energy of suspended mass expressed in kWh

    Seems arbitrary. 9.863 rounds off to 9.9.
  7. CircutScoper

    Potential energy of suspended mass expressed in kWh

    Rabbit hole is right, because the time required for the Earth to revolve one complete turn on its axis is actually only 86,164 seconds = the length of the sidereal day. 86,400 seconds, by contrast, is the length of the mean solar day, which is really only an optical illusion: E.g.: sunrise.
  8. CircutScoper

    Potential energy of suspended mass expressed in kWh

    First tell me what value you're using for g, which varies from 9.798 at the equator to 9.863 at the poles.
  9. CircutScoper

    Potential energy of suspended mass expressed in kWh

    In nanoseconds, fortnights, or parsecs?
  10. CircutScoper

    Potential energy of suspended mass expressed in kWh

    Didn't work. So they had to go with an arbitrary lump whittled out of platinum. Meanwhile, the fundamental fact in play here is that weights and measures have nothing to do with science. They're nothing but politics. https://www.livescience.com/26017-kilogram-gained-weight.html#:~:text=To...
  11. CircutScoper

    Potential energy of suspended mass expressed in kWh

    In the middle of the French revolution when the metre was defined in between sessions of lopping off heads, krypton wasn't even yet known to exist.
  12. CircutScoper

    Potential energy of suspended mass expressed in kWh

    No. 1000kg = 1Mg and 29,400J (0.00817kWh) can lift it 3m against the force of gravity -- provided you do it very slowly. Do it fast, and you'll need extra Joules to produce the necessary kinetic energy.
  13. CircutScoper

    Potential energy of suspended mass expressed in kWh

    Not arbitrary? Well, let's see... The meter was originally defined to be 1/40.000,000th of the polar circumference of the Earth -- which varies arbitrarily with longitude. The kilogram was defined from 1/10th of that. cubed, times the density of water -- which varies arbitrarily with...
  14. CircutScoper

    Potential energy of suspended mass expressed in kWh

    Okay. 1 horse power hour equals (just slightly less than) 2 million foot-pounds. Therefore the energy required to raise one ton (2000lbs) 10 feet = 20,000 ft-lbs = 1/100th hp-hr. Actually that does look better, doesn't it?
  15. CircutScoper

    Potential energy of suspended mass expressed in kWh

    29.4kJ = 0.00817 kWhr to raise a metric ton three meters against 9800 Newtons of gravitational force is correct. The takeaway is that 1kWhr = 3.6MJ is a buttload (technical physics term) of energy that could life 1000kg 367 meters.
  16. CircutScoper

    Bell pull project

    A good suggestion -- but possibly a bit too practical, cost effective, and functional, while not sufficiently nostalgic, difficult, and silly?
  17. CircutScoper

    Video signal DC level adjustment

    What he said!
  18. CircutScoper

    Video signal DC level adjustment

    What he said! Check out fig. 1 in the link below to see how simple video DC restoration off the horizontal sync pulse is -- just a cap and a diode. https://www.analog.com/media/en/technical-documentation/application-notes/an-1603.pdf
  19. CircutScoper

    Radio spelunking reception

    Zero. https://en.wikipedia.org/wiki/Communication_with_submarines#:~:text=VLF%20radio%20waves%20(3%E2%80%9330,antenna%20on%20a%20long%20cable.
  20. CircutScoper

    Remington Shaver HC6550 not to full Power

    Are you saying that the top-to-top reading rises from 0V to 0.4V while the motors are running?
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