A card from a free library — ask anything, no account, works offline. Every card carries its source.
One half-life of a radioactive clock
earth life
After one half-life — 5,730 years for carbon-14 — exactly half the original atoms remain. This is how charcoal, bone and shell are dated. Worked & sealed by the engine — N = 100·½¹ = 50 after one half-life. [HOLDS; open the seal to re-check.]
source
card id
card_works_radiometric
address
UNPLACED
adjoining cards
- on the shelf of → The Works — sealed, worked demonstrations — a member of the the-works shelf in the keeping
- paves → The Floor of Discovery — one floor, and by its design the fear of God — A worked, engine-sealed demonstration — a paving-stone of the floor of reality.
- demonstrates → N = 100·½¹ = 50 after one half-life — A worked demonstration in the same field (geology).
- adjacent → The carbon cost of a hundred kilometres — Neighbouring worked demonstrations in the same part of the volume.
- adjacent → Reading and mirroring a strand of DNA — Neighbouring worked demonstrations in the same part of the volume.
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