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Kepler's law, and the pull between Earth and Moon
physical
Kepler's third law binds a planet's period to its orbit (T² = a³); Newton's gravity gives the force holding the Moon — about 2 × 10²⁰ newtons. Worked & sealed by the engine — T² = a³ for Earth (1 yr, 1 AU) · F = G·M·m/r² ≈ 1.98 × 10²⁰ N (Earth–Moon). [HOLDS; open the seal to re-check.]
source
card id
card_works_astronomy
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 → T² = a³ for Earth (1 yr, 1 AU) · F = G·M·m/r² ≈ 1.98 × 10²⁰ N (Earth–Moon) — A worked demonstration in the same field (astronomy).
- adjacent → A 2 kg mass: the force to move it, the energy it carries — Neighbouring worked demonstrations in the same part of the volume.
- adjacent → The Carnot ceiling no engine can beat — Neighbouring worked demonstrations in the same part of the volume.
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