• JackbyDev
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    36 days ago

    You can experience this if you hit a coin with a hammer a few times.

    • Grubberfly 🔮
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      218 days ago

      incredible engineering feat !

      this will definitely fulfill someone’s kink.

    • @[email protected]
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      48 days ago

      I was going to link it if no one else had. Glad I wasn’t the only one that recalled that lol

    • @[email protected]
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      48 days ago

      Damn that was impressive! Also, I’ll have to let my little brother know that if he keeps beating his meat so much he might accidentally cook it.

  • @[email protected]
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    988 days ago

    Let’s assume the chicken has to reach a temperature of 205C (400F) for us to consider it cooked.

    Remind me never to let this guy cook for me.

  • @[email protected]
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    738 days ago

    What I learned from this is never let a physics major cook you dinner, unless you want charcoal for chicken (200C !?!)

    • @[email protected]
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      14
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      8 days ago

      Yeah 60c is done for chicken. That’s where meat goes from pink to white. It takes 18 min to kill dangerous food bacteria at that temp.

      • @[email protected]
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        6
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        8 days ago

        0 C wouldn’t quite be frozen solid for chicken since it’s not pure water. According to a quick search, chicken (unbrined) freezes at -3 C. So technically it is defrosted, but it should start out closer to 10 C for good results.

    • @[email protected]
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      98 days ago

      I was gonna say to start laying off when it gets to 165F, I don’t think residual heat will help in this case 😁

    • @[email protected]
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      58 days ago

      Luckily, it’s a linear relationship and they gave us the temp change per slap. So, if we assume the chicken has thawed in the fridge (40°F) and we want to reach 165°F for food safety, we only need

      (165 - 40)°F * (5°C / 9°F) / (0.0089 °C / slap)
      = 7803 slaps
      

      Although, to be honest I think this would only work for a spherical chicken in a vacuum, as otherwise you’d be losing too much heat between slaps. And even in a vacuum, you’d lose some heat via radiation… So really, you should stick a temperature probe in there and just keep slapping until it reaches 165°F. Don’t even bother counting.

      Sorry for the silly units, I only know food safety temperatures off the top of my head in °F.

      • Maturin [any]
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        38 days ago

        don’t even bother counting.

        Wish I had know this tip earlier. Got to five thousand something, lost count and had to start over.

  • MyTurtleSwimsUpsideDown
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    509 days ago

    Don’t forget, the chicken is frozen, so you also have to take into account the latent heat of fusion to melt the chicken before you can raise the temperature

    This calculation also assumes that this is an inelastic collision where all the energy is absorbed into the chicken and not into your hand or into the air as sound or other kinetic energy.

    Further the chicken is frozen solid, and, presumably, your hand is not. Of the two objects in this collision that could deform inelasticity and absorb the larger fraction of the energy, my money would be on the 0.4 kg slab of raw meat rather than the 1kg frozen billiard ball.

    • @[email protected]
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      218 days ago

      One must also consider the thermal conduction of the chicken. Slapping it, either once or multiple times, on a single area will impart energy to that area, raising the temperature there, but it will take time for that to disperse throughout the fowl. Thus will inevitably lead to the slapped area/areas being overcooked and the rest being dangerously undercooked. Losses to the environment must additionally be taken into account unless sufficient insulation is employed to mitigate this.

        • @[email protected]
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          58 days ago

          Yes, I think the chicken would need to be rotating, you should use both hands to spread the warmed area, and be prepared to administer more slaps than were calculated.

    • @[email protected]
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      38 days ago

      Since we’re being pedantic, the feeezing point of unbrined chicken is -3 C. Most meats are not frozen at exactly 0 C since the water contained in the cells is far from pure.

      But yeah, slapping will be a super lossy process and this analysis will be off by quite a bit.

      • MyTurtleSwimsUpsideDown
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        28 days ago

        Touché!

        I wonder if there’d be any fractional freezing at 0C 🤔

        Great… now I’m imagining raw chichen slushie 🤮

    • @[email protected]
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      28 days ago

      Isn’t 1600 m/s greater than the speed of sound? That sonic boom is gonna mess up the kitchen, if not the hand.

  • @[email protected]
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    9 days ago

    205°C? You’re slapping your chicken too long, son. Your mother and I are worried.

  • @[email protected]
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    278 days ago

    To be clear, the slapping would have to be done in one single second to account for heat loss to environment.

      • @[email protected]
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        8 days ago

        It’s expected there will be some heat loss over time in any scenario, I’m just explaining that the exact numbers to reach 200C chicken (way overcooked) in this very specific example only work if it happens near instantly.

        You can still cook it over time, easily, just with different numbers than this example.

        • @[email protected]
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          28 days ago

          I didn’t check the calculation, but I guess it assumes perfect conversion of motion to heat. But it’s good to know that if you can get a perfectly static chicken, you can hypersonic-slap it cooked.

  • @[email protected]
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    148 days ago

    One thing to note, actually cooking something requires an application of heat over time. Instantaneous heat transfer will not cook, it will usually just burn.

    Some people say you can use a nuke to cook a pizza if you put it in the right spot, but the same problem would apply.

    Related, some guy did actually slap a chicken into being cooked. It was predictably disgusting:

    https://www.youtube.com/watch?v=LHFhnnTWMgI

  • Adlach
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    8 days ago

    At 400F it would no longer be a chicken but a pile of glowing cinders. A chicken is cooked at 165F.

  • @[email protected]
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    88 days ago

    Fun fact, 165F is often parroted for cooking chicken, but I urge everyone to go lower. 155-160F results in much juicier chicken. 165F corresponds to instantaneously killing all bacteria. 155F is about 60s, and 160F is 15s.

    • @[email protected]
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      17 days ago

      And for even juicier chicken, directly inject cranberry juice using a needle and syringe. You can use other juices, but IMO, cranberry goes best with chicken.

      For outrageously juicy chicken, sous vide to 155-160F directly in cranberry juice (no vacuum bag). This may bring the chicken beyond many people’s juicy limits, so I suggest trying the other two recipes first to gauge your personally acceptable limit of juiciness.

  • @[email protected]
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    89 days ago

    That’s assuming an isentropic chicken though. You need even more slaps to make up for the heat loss to the environment.

    • southsamurai
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      108 days ago

      Because we are men, and men feel no pain when we slap things.

      This is why we slap each other on the back after losses in sports, and why pimpin ain’t easy.