Recent content by russ_watters

  1. russ_watters

    Undergrad Are the basic axioms of thermodynamics demonstrated experimentally?

    That's what I was going to say, and to add; convection(and heat transfer in general) might be a fairly simple concept, but it gets pretty complex pretty quickly.
  2. russ_watters

    Random Photos

    Yesterday, yes - thanks!
  3. russ_watters

    Random Photos

    From my wedding.
  4. russ_watters

    Methane as a greenhouse gas

    I know this thread is locked, but I'll answer this anyway: The link @pinball1970 posted answers you fine. It says: "Methane (CH4) is estimated to have a GWP of 27 to 30 over 100 years." This doesn't contradict the 84-87 over 20 years: Since CO2 does not decay and methane does, yes, the GWP...
  5. russ_watters

    Expansion or compression -- which is more energy efficient?

    So, are these the processes? I really don't like guessing, but.... Gas in the cylinder starts at atmospheric pressure and room temperature. 1. Gas is adiabatically expanded and cooled. That part you at least made clear. 2. Gas absorbs heat from the room, heating it to room temperature, but...
  6. russ_watters

    Is A.I. more than the sum of its parts?

    It wasn't a complaint specific to your post, it was just a disclaimer for the conversation. Whether that's something in your head or not it is something that I see a lot and would expect to see in this thread.
  7. russ_watters

    Expansion or compression -- which is more energy efficient?

    I get your overall goal, but you are not fully describing your cycles. Are you saying it's closed, not open? Did I miss where you described a phase change? Be clear in describing the processes involved. For the first scenario, is the high pressure side of the piston open to outdoors, as in...
  8. russ_watters

    Expansion or compression -- which is more energy efficient?

    Usually thermodynamic cycles are described with simple statements of the involved processes. @T C you are leaving out steps in your cycles, leaving us to guess what they are. Based on what you've said, it sounds like you intend your second cycle to be an open, compressed-air refrigeration...
  9. russ_watters

    Is A.I. more than the sum of its parts?

    Note to start, that "our existing laws don't punish corporations enough" is a very different complaint than "our existing laws wouldn't apply to OpenAI/this case". I'm an AI minimalist so I lean towards the "glorified google" take. For the hypotheticals of if ChatGPT counseled or assisted with...
  10. russ_watters

    Is A.I. more than the sum of its parts?

    That says they have opened an investigation and are looking for something that might violate this: "Florida law states that anyone who aids, abets, or counsels someone in the commission of a crime, and that crime is committed or attempted, may be considered a principal to the crime. The “aider...
  11. russ_watters

    Expansion or compression -- which is more energy efficient?

    Without checking your math, please note that your first case doesn't consume/input mechanical work it outputs mechanical work. The gas pushing on the piston causes the expansion. The piston is not being pulled away from the gas (unless you are also doing work against the atmosphere...).
  12. russ_watters

    Point of particular Doonesbury strip?

    It was founded as and remains a ship-board infantry force attached to the Navy. At the time, Naval combat often involved boarding and seizing enemy ships, plus landing at and securing ports, security, etc. That first mission is now gone, but the others remain. I suppose some of it is a matter...
  13. russ_watters

    Point of particular Doonesbury strip?

    That's my interpretation as well, but I don't see how it qualifies as a joke.
  14. russ_watters

    Graduate Does a moving particle count as a wave?

    The first word of the next sentence of the article is "periodic". I guess what you are implying/asking is whether a wave can be non-periodic/oscillating. I don't think so.