From the archive · #63

A little curiosity.
From the archive.

Five flashcards. A fresh discovery. Your moment to get a little more out of the world.

March 4, 2026Measures & ConstantsNo account needed · No timer
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Prompt: Water freezes at 32 degrees on this temperature scale, still common in the United States.
ScienceA little curiosity
Unit or constant · RECALLWater freezes at 32 degrees on this temperature scale, still common in the United States.Think it. Then flip it.
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  1. 01Water freezes at 32 degrees on this temperature scale, still common in the United States.
  2. 02This unit, the metric base unit of length, is now defined by the distance light travels in a set fraction of a second.
  3. 03This SI energy unit equals the work done by one newton acting through one metre in its direction.
  4. 04At standard atmospheric pressure, water freezes at 0 and boils at 100 on this temperature scale.
  5. 05This unit, the metric base unit of mass, is now defined using a fixed value of Planck's constant.