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.
this post was submitted on 11 Sep 2024
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His roasts be literally disgusting. He’s off by 2x. Does that mean I only have to slap the chicken at about 2k mph to cook it like a normal person.
What I learned from this is never let a physics major cook you dinner, unless you want charcoal for chicken (200C !?!)
And they didn't defrost it first 🫠
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.
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.
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.
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.
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.
Touché!
I wonder if there’d be any fractional freezing at 0C 🤔
Great… now I’m imagining raw chichen slushie 🤮
Isn't 1600 m/s greater than the speed of sound? That sonic boom is gonna mess up the kitchen, if not the hand.
205°C? You're slapping your chicken too long, son. Your mother and I are worried.
There was a viral YouTube video of doing exactly this a few years back.
When Martha from accounting last asked me what my plans were for that night, I told her I was going to slap my chicken.
She won't look me in the eye any more.
Yeah, I also don't talk with people who engage in animal cruelty
This isn't going to be accurate, it's ignoring a key aspect of the heat that will be generated, friction. When designing materials for prosthetics we have to be aware of how much friction occurs between the material and skin. If the amount of friction is too great, the material can create enough heat to damage tissue.
The formula for the skin friction coefficient is cf=τw12ρeue2, where ρe and ue are the density and longitudinal velocity at the boundary layer's edge.
It's also ignoring your hand would also heat up, ignoring the energy converted to sound, ignoring the heat loss to the environment, ignoring both your hand and the chicken would disintegrate if you hit it that hard, therefore transferring most kinetic energy without converting it, ignoring the enthalpy of fusion (they said it's frozen)...
TLDR: it's silly, just for funsies
I once watched a youtube video where someone built a rig to explore this very question
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.
You can experience this if you hit a coin with a hammer a few times.
If you could have a superpower, what would it be?
Me: I'd like to be able to slap fast. Like really fast.
And what would that do to my hand?
I read once that the Mongolian warriors would place raw meat under their saddles and after riding all day would then consume it. Now I'm thinking that's not so far fetched.
Average rotisserie chicken is 2 lb? Costco's is 3lb. That would require many more slaps.
Not chicken, but someone tried hitting steak with drum pedals: https://m.youtube.com/watch?v=QFTCqnYk5Sw
So the flash could cook a chicken by slapping it
There are so many weird assumptions here. There is more than a hand moving when a slap is performed.
A skilled slapper could put more of their body weight behind the slap. I'd assume at least 40 kg or even more as the average slap.