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MythTickle by Justin Thompson

MythTickle

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  1. Baslim the beggar GoComics Pro Member commented on Jeff Stahler about 3 hours ago

    Sorry, I don’t understand the question. What “deal” are you referring to?

  2. Baslim the beggar GoComics Pro Member commented on Jeff Stahler about 7 hours ago

    As Old Coal pointed out, you are way off base.

    Start with F=Ma, where M is the mass of the ship.
    Okay Force= the time rate of change of momentum, or F=dp/dt, where p=mv.
    .
    For the rocket equation, v is constant exhaust velocity, so dp=vdm/dt.
    .
    Ma=vdm/dt
    .
    for the rocket, dm/dt =dM/dt
    .
    vdM/dt = Ma
    .
    We have a = your 1 m/sec/sec.
    For the perfect rocket engine, using matter conversion we might expect at best a v of c/2. (c=3×10 8 m/s)
    .
    (1/M)dM/dt = 2a/c

    2a/c= -.2/3×10 8 =6.67×10 -10
    .
    So the rate of mass loss is small for this system.
    Multiply both sides by dt

    (dM/M)= (2a/c)dt
    Integrate.
    .
    ln M(t) – ln M(t=0) = (2at/c)

    or we could rewrite it as
    M(t)=M(t=0) x exp (-2at/c)
    The minus sign in the exponent assures us that we are losing mass, not gaining it.
    .
    Let’s set t=1.5×10 7 sec, or about 6 months.

    The term in the exponent is then
    -0.01
    .
    So the ratio of the mass at six months to the initial mass is 0.99.
    .
    How far has the ship traveled?

    dist=0.5*a*t*t=1.125×10 13 meters
    or 11 billion kilometers, well past beyond the Pluto.
    .
    The speed?

    v(t)=a x t= 1.5 × 10 6 meters per second, or 1/200th of the speed of light. So all is non-relativistic and the equations I have used need no serious modification.

  3. Baslim the beggar GoComics Pro Member commented on Brian McFadden about 9 hours ago

    The thing about dealing with BO is that he makes me understand quite well what Wolfgang Pauli meant when he said of someone’s theory, “It’s not even wrong.” So it is with BO.
    .
    Contrary to his bluster, scientists have understood the physics he claims they do not understand. What BO refuses to recognize is that natural events that take place at glacial speeds are not relevant to any discussion about the effects of AGW. AGW is concerned with actions and consequences on human civilization time scales, not glacial time scales.

    .
    Just look at the time interval of glacial cycles. Over than last several hundred thousand years, the time it took for CO2 to go from minimum to maximum ( a difference of roughly 85 ppm) was no less than 7000 years. No less than 7000 years. That’s a glacial scale. Living systems, which BO pooh-poohs, take time to adapt to changing conditions.
    .
    Humans have dumped enough CO2 into the atmosphere and the oceans such that the CO2 has increased by 85 ppm in 50 years. That is too fast for living systems to adapt, as we see all around the world. Living systems, you know, those things which are supposed to benefit from an increase in CO2, but which somehow, because, gosh willikers, increasing temperatures will follow increasing CO2, tend to affect plants and animals in adverse ways. Adaption occurs in some cases, but there are limits to the speed of adaption and to the speed with which different species colonize more favorable land (or sea). This, the deniers uniformly fail to understand.
    .
    All of BO’s snide, yet in the end really foolish comments are meant to obscure the issue. The goal of CO2 reduction is not to create an ice age. All his questions are trying to shift attention from what can be done on the human time scale, not on the glacial time scale. So his little questions are crap.
    .
    Reducing Greenhouse gas release into the atmosphere slows down the rate of increase of temperature rise. That will eventually slow down sea level rise. Glacier melt? Maybe. I don’t address his other stupid stuff because it is not relevant.
    .
    As another example of BOs insufferable arrogance, it is in fact, well understood that warming will cause precipitation. And presumably already is doing so. But here’s the fly in the BO ointment. Precipitation increases are found (using models and actual measurement) to be gaining more in intense precipitation than otherwise. In other words, the effect is not just more rain, but more intense rain. Remember all that recent flooding in so many places? That was good for the humans affected, wasn’t it? Guess what? More to come.
    .
    Letting the warming continue unabated will only continue to result in things which adversely affect civilization as we have it now. BO paints a rosy picture of the Sahara greening, but that happened because of a solar insolation change. Solar insolation, which BO refuses to acknowledge as the driving factor in ice ages. All of that took place over long time scales.

    http://www.astrobio.net/news-exclusive/how-earths-orbital-shift-shaped-the-sahara/

    Brass Orchid, not even wrong, not even remotely relevant.

  4. Baslim the beggar GoComics Pro Member commented on Jeff Stahler about 11 hours ago

    Counter-argument: von Neumann machines
    .
    Oooh unnatural EM radiation! A site with potential for conversion! Onward!

    Eatee homes phones…

  5. Baslim the beggar GoComics Pro Member commented on Brian McFadden about 12 hours ago

    Liar!
    https://www.climate.gov/news-features/understanding-climate/climate-change-global-temperature

  6. Baslim the beggar GoComics Pro Member commented on Jeff Stahler about 13 hours ago

    Space Elevators are the best way to get people off of the planet. But they are not yet feasible, nor do we know if we can build the material needed. Without the elevator you are a slave to the rocket equations, which tell you that you need lots of fuel to move a small package to orbit.
    .
    From there (the end station of the elevator) to the moon, not so bad energy wise. EM launchers from the moon to send material to Lagrange points would be the next stage. Then the O’Neill colonies can be started. More importantly the Lagrange points become the places from which missions to capture small asteroids and comets originate.
    .
    Places like the moon and Mars have gravity wells to overcome, and you have to live inside quarters in both places. Better to live in an O’Neill colony.
    .
    More than 50 years ago it was proposed that asteroids could be modified by melting them, spinning them up into hollow shells, and then allowing them to cool. The interiors then become living space like an O’Neill colony. As with those, sunlight must be sent into the interior.
    .
    Move one out to Saturn, and have a great view. You can do the same at Jupiter, where you want to have a colony skin designed to mitigate the high radiation due to Jupiter’s magnetic field.
    .
    One of the best recent SF books on interstellar travel is Arkwright by Allen Steele. It’s a very plausible method. But only genetic material is sent and some robots capable of building more machines.
    .
    To me, it seems that if we ever get to the point of transferring our minds to silicon, then we, or rather our descendants, can make long journeys. In “ships” that will protect us from cosmic debris and radiation for the long journeys. A million year journey with a millions of minds taking short “watches” and dormant most of the rest of the time seems quite possible then.

  7. Baslim the beggar GoComics Pro Member commented on New Adventures of Queen Victoria about 14 hours ago

    Grace the Face is a clip-art character formerly frequently found in Frog Applause.
    .
    Pab sometimes does stuff like this, causing interactions with other cartoon characters. He’s not alone. Several others do it as well.

  8. Baslim the beggar GoComics Pro Member commented on Tom Toles 1 day ago

    Yes, but informed about what?!
    .
    That stuff you find on the bottom of the henhouse…

  9. Baslim the beggar GoComics Pro Member commented on Signe Wilkinson 1 day ago

    And yes, you should take it personally and do the research next time. Clearly, I was not the only one who was disgusted by what you wrote.

  10. Baslim the beggar GoComics Pro Member commented on Signe Wilkinson 1 day ago

    I said you were spreading troll manure. I don’t expect that you generated it.
    ,
    But you are just whining, because, if you had a question about that “story” why did you not search it out, as I did?
    .
    Laziness is not an excuse. If you have the energy to post this stuff, you have the energy to investigate before repeating tripe.
    .
    Were this the only time you had done this sort of thing, you’d get some slack. But it isn’t.