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Would this even work? Lol

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[-] Turun@feddit.de 13 points 1 year ago* (last edited 1 year ago)
  1. Use a metal straw to improve heat conduction.

While metal is a better conductor of heat, when looking at the effective rate of cooling you need to take the wall thickness into account. I think a plastic straw with it's micrometer thin walls is unbeatable.

Edit: I have trouble finding information on wall thickness of drinking straws, it one source says they are 130-250 μm thick. That is thicker than I expected.

[-] jana@leminal.space 8 points 1 year ago

Counterpoint: drink a cold drink through a plastic straw and a metal straw, with your fingers on the straw. See which one feels cooler.

[-] Instigate@aussie.zone 11 points 1 year ago

Leave a block of wood and a brick of steel in a freezer for 24 hours and see which one feels cooler - they’ll be the same actual temperature (at least negligibly close the longer they’re left) but the metal will feel immensely cooler to the touch due to its higher capacity for heat transference.

[-] jana@leminal.space 3 points 1 year ago

Doesn't that just agree with what I'm saying? The metal is going to transfer heat more easily than the plastic

[-] Turun@feddit.de 4 points 1 year ago

There are two compounding factors

  • heat capacity: any short term experiment will measure heat capacity first, conduction second

  • locality of contact: contact along the whole length of the straw eliminates heat conduction along the length of the straw. A single point of contact (holding the straw with fingers instead of the whole hand) behaves differently.

I thought plastic straws were thinner than 0.2 mm, so maybe the metal is actually better.

It's fun arguing about these technicalities though!

this post was submitted on 26 Sep 2023
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