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WikiCards · Card list · Science cards · Equivalence principle
Uncommon card · Science
Equivalence principle, an Uncommon card
The equivalence principle is the hypothesis that the observed equivalence of gravitational and inertial mass is a consequence of nature.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 77
- DEF
- 77
- Power
- 154
- Wikipedia reads a year
- 60,000
Power 154 (ATK + DEF): stronger than 80 % of WikiCards cards.
The facts on the card
The card carries these facts from its Wikipedia article.
- The weak form, known for centuries, relates to masses of any composition in free fall taking the same trajectories and landing at identical times.
- The extended form by Albert Einstein requires special relativity to also hold in free fall and requires the weak equivalence to be valid everywhere.
- This form was a critical input for the development of the theory of general relativity.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Equivalence principle article was read about 60,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 77 and blocks with 77: each hit it takes is cut by 31 %.
How to get Equivalence principle
Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.
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Card lists
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- All cards from A to ZEvery card, by name
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Credits
Text : Wikipedia, Equivalence principle (revision), CC BY-SA 4.0. Photo : derivative work: Pbroks13 ( talk ) Elevator_gravity2.png : Markus Poessel ( Mapos ), CC BY-SA 3.0, Wikimedia Commons.
