How Long is a Second?: A Quiz Deck on the Science of Time and the History of Keeping it (Knowledge Cards) - Softcover

Don Root

 
9780764948572: How Long is a Second?: A Quiz Deck on the Science of Time and the History of Keeping it (Knowledge Cards)
Softcover
ISBN 10: 0764948571 ISBN 13: 9780764948572
Verlag: POMEGRANATE COMMUNICATIONS INC, 2009

Inhaltsangabe

Clocks connect us to our universe. From the upright stick whose shadow traced the hours to the pendulums that imitated Galileo s swaying chandelier, the tools used early on to slice up the day measured the motion of Earth. More recently the task of measuring time has been assigned to atoms: the newest generation of atomic clocks is accurate to within one second in eighty million years.

The 48 cards in this deck examine some of the challenges involved in modern timekeeping, from creating wristwatches to coordinating clocks around the world. And a few glances are cast at the past, with cards devoted to ancient calendars and clocks made of incense and dripping water.

These 48 fact-filled Knowledge Cards are a great source of condensed information all in a deck the size of a pack of playing cards.

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Verlag
POMEGRANATE COMMUNICATIONS INC
Erscheinungsdatum
2009
Sprache
Englisch
ISBN 10 
0764948571
ISBN 13 
9780764948572
Einband
Taschenbuch
Anzahl der Seiten
48
Kontakt zum Hersteller
Nicht verfügbar
Verantwortliche Person
M.E.G. Cards and Gifts
443000000000
accounts@megcards.com

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