SortStack #2736 — 2033-12-05

By size · Order from shortest to longest.

1. A tennis ball 6.7 cm

   Tennis balls are pressurised with gas and slowly go flat, which is why fresh cans hiss when opened.

2. A French baguette 63 cm

   French law defines the traditional baguette so strictly it can contain only flour, water, salt and yeast.

3. An acoustic guitar 99 cm

   The guitar's hollow body acts as an amplifier, resonating the strings' vibration into the air around it.

4. The Verrazzano-Narrows Bridge (main span) 1.3 km

   Its towers are slightly farther apart at the top than the bottom because they must follow Earth's curvature.

5. The Panama Canal 85 km

   Ships are lifted 26 metres above sea level by locks, then lowered again, crossing a continent without touching the ocean between.

6. The River Danube (length) 2.9K km

   It flows through more countries than any other river in the world, passing four national capitals on its way.

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