Recent content by russ_watters

  1. russ_watters

    A practical way to vaporize fuel for high MPG?

    I did some simple cals on this once here, but can't find them, so I'll recreate: Gasoline has an energy content of 33.41 kWh / gal, or 44.8 hp-hr/gal: https://en.wikipedia.org/wiki/Gasoline_gallon_equivalent#Gasoline_gallon_equivalent_tables A simple example is 60 mph at 30 gpm = 2 gal / hr...
  2. russ_watters

    B The Effect of Linear and Rotational Motion on Measured Weight

    Motion has no impact on weight, classically. The only sorta exception is a vertical oscillation/unbalanced rotation would cause the reading to oscillate.
  3. russ_watters

    Yikes! Autonomous cars to control intersections, drivers be aware!

    Yeah, that's a thing in the US too: https://www.wave3.com/story/8770053/man-caught-using-device-to-change-traffic-signals/
  4. russ_watters

    Yikes! Autonomous cars to control intersections, drivers be aware!

    It's a thing in the US: https://www.clickorlando.com/traffic/2020/06/15/heres-how-emergency-vehicles-change-traffic-lights-on-the-fly/
  5. russ_watters

    Why does the amperage go real high if there is a low voltage short?

    A short, by definition, is a low resistance path for the electricity to take. Electricity prefers paths of low resistance.
  6. russ_watters

    RIP Robert Redford (89)

    I watched "Sneakers" last night just cuz.
  7. russ_watters

    B Why can't Solar panels be hemispherical, or a curved strip type?

    Single axis means they trace one arc across the sky. The sun traces a different arc every day. I'd presume that the optimal arc for maximizing annual energy production is somewhere between maximum summer and maximum winter peak power.
  8. russ_watters

    I Potential biosignature found in Mars rock

    So, am I to understand these are chemicals/reactions that could have been produced by life? On a planet we're physically scouring I don't think I'm going to find that sort of discovery compelling. If anything reduces my hope that we might find alien life in my lifetime. I had been thinking...
  9. russ_watters

    Most Hard-Driving Music?

    That was the first time I noticed a car being marketed to me. It kinda worked (I bought the car). It's fine, not like when I started noticing them pushing mini-vans on me...
  10. russ_watters

    B Can Light Speed Be Increased by Straightening Its Wave Path?

    Can you do that with sound, or any wave? Sorry, but the idea doesn't really make sense (and light isn't really a wave anyway).
  11. russ_watters

    Cantilever help

    A 17' span is pretty big too. This sounds to me like something that's illegal to do without a licensed structural engineer. So I'm locking this, per our rules.
  12. russ_watters

    A Condensate rate of water for an air conditioning cooling coil

    That assumes all of the energy extracted is for condensing water. You can do something like that with a more complicated cycle/system, but for a standard air conditioning unit, if you start with saturated inlet air you still have about 2/3 sensible cooling and 1/3 latent.
  13. russ_watters

    A Condensate rate of water for an air conditioning cooling coil

    This is relatively easy to calculate by hand. Are you familiar with the psychrometric chart? You can manually look up values in the chart (you should at least get familiar with it) or get them from a website with a form. You need absolute humidity and enthalpy. From incoming air enthalpy...
  14. russ_watters

    How do people explore new ideas in physics?

    It's not a "holier than thou attitude", it's a true reality. That's not what I said. I said "near zero". It's certainly possible (not exactly zero) but it is so low as to be a waste of physicists' time searching through thousands of bad papers looking for a good one that may not exist...
  15. russ_watters

    How do people explore new ideas in physics?

    There's really no way around the fact that the barrier to entry (being educated in physics) is required for practical reasons. There's near zero chance that someone who isn't fully educated and up to date in the subject has anything meaningful to contribute. It would be like a non-doctor...
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