SortStack #798 — 2028-08-15

By weight · Order from lightest to heaviest.

1. A one-euro coin 7.5 g

   Its two-metal design is not just style — the distinct layers give vending machines an electromagnetic signature to verify.

2. An iPhone 15 Pro 187 g

   Its titanium frame is the same alloy grade used in spacecraft and joint implants, trimming heft from earlier steel models.

3. A liter of water 1 kg

   The kilogram was originally defined in the 1790s as the mass of exactly this much water — the tie was only fully broken in 2019.

4. A classic yellow American school bus 11 t

   The exact yellow is a legal standard from 1939, chosen because black lettering on it reads fastest in dim morning light.

5. Howard Hughes' Spruce Goose flying boat 113 t

   It held the record for largest wingspan of any aircraft until 2019, yet flew exactly once, in 1947 — for about 26 seconds.

6. A Saturn V rocket, fully fueled for a Moon launch 3K t

   Apollo crews rode atop a small warship's worth of kerosene, hydrogen, and oxygen — most of it burned within minutes.

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