He/Him Jack of all trades, master of none

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Joined 3 years ago
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Cake day: August 10th, 2023

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  • starman2112@sh.itjust.workstoScience Memes@mander.xyzMake it so
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    2 months ago

    Still violates the laws of physics

    You and I are in two conventional spaceships traveling at 0.86c relative to each other. In my reference frame, you are traveling through time at half the rate I am. This is due to time dilation, not speed of light delay. After I experience one year on my ship, you will have experienced 6 months on your ship. In your reference frame, the opposite is true. After you experience one year on your ship, I will have experienced 6 months on my ship. This violates no laws of physics, because even though there is no universal “present,” the limited speed of light ensures that causality is maintained.

    Both of our ships have away shuttles with Alcubierre drives. These away shuttles can move arbitrarily fast, far in excess of the speed of light, without ever leaving their parent ship’s reference frame.

    After 60 years, my ship has a cyclospirosis outbreak because someone didn’t wash their hands. The last pilot not suffering from explosive diarrhea hops in our away ship and instantaneously warps some distance in front of your ship (reminder: in my reference frame, you have only aged 30 years). He sends you a message explaining the situation. This message reaches you after you’ve only aged 30 years.

    Swapping to your reference frame now. Causality must be preserved, so since you received that message after 30 years in my reference frame, you must receive that message after 30 years in your own. But in your reference frame, after 30 years of passed, my clock is only at 15 years. You decide to send your own away shuttle to warn us about this future outbreak. Your away shuttle arrives arbitrarily fast, sending us a message about a future cyclospirosis outbreak that arrives 45 years before that outbreak happens.

    You can dress your FTL technology in whatever sci-fi snake oil you want. If you can get information to a destination faster than a photon could, you can break causality.
















  • starman2112@sh.itjust.workstoScience Memes@mander.xyzGotta go fast
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    5 months ago
    1. Coal. Set it on fire, use fire to boil water
    2. Geothermal. Go down where the rocks are hot, use hot rocks to boil water.
    3. Nuclear. Magic rocks get hot all by themselves. Use them to boil water.
    4. Photovoltaics. Shape rocks into solar panels, use solar panels to power stove to boil water.
    5. Concentrated solar. Use mirrors to reflect sunlight onto salt (a rock). Boil water with hot salt.
    6. Put water in a glass tube. Use mercury (which comes from a rock) to draw a vacuum. Water boils at room temp under a vacuum.
    7. Lob a space rock at the planet. Space rock vaporizes everything in a 100 mile radius, including water.

    I’m sure we can think of more