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WikiCards · Card list · Science cards · Mass–energy equivalence
Rare card · Science
Mass–energy equivalence, a Rare card
In physics, mass–energy equivalence is the relationship between mass and energy in a system's rest frame.
- Rarity
- Rare
- Domain
- Science
- ATK
- 83
- DEF
- 91
- Power
- 174
- Wikipedia reads a year
- 380,000
Power 174 (ATK + DEF): stronger than 90 % of WikiCards cards.
Mass–energy equivalence quiz: 3 questions
Three questions on the Mass–energy equivalence card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
The two differ only by a ______ constant and the units of measurement.
Answer
multiplicative. The two differ only by a multiplicative constant and the units of measurement. From the Mass–energy equivalence article on Wikipedia.
Which of these cards hits hardest (highest ATK)?
Answer
Supermassive black hole. Supermassive black hole 86 · Mass–energy equivalence 83 · Quartz 79 · Gun 76 ATK in WikiCards.
In a duel, each round asks a question like these about the opposing card, with 15 seconds to answer.
The facts on the card
The card carries these facts from its Wikipedia article.
- The two differ only by a multiplicative constant and the units of measurement.
- The principle is described by the physicist Albert Einstein's formula: E = m c 2. The formula defines the energy, E, of a particle in its rest frame as the product of mass, m, with the speed of light, c, squared.
- Because the speed of light is a large number and it is squared, the formula implies that a small amount of mass corresponds to an enormous amount of energy.
Why it is Rare
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Mass–energy equivalence article was read about 380,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 83 and blocks with 91: each hit it takes is cut by 36 %.
How to get Mass–energy equivalence
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.
More Science cards
Cards close in power
The cards just above and just below Mass–energy equivalence in the power ranking, all domains together.
- AmoxicillinRare · Science · ATK 77 DEF 97
- Supermassive black holeRare · Science · ATK 86 DEF 88
- Battle of LepantoRare · History · ATK 81 DEF 93
- LocustRare · Nature · ATK 78 DEF 96
- Louis IX of FranceRare · History · ATK 80 DEF 94
- AdenRare · History · ATK 87 DEF 87
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Credits
Text : Wikipedia, Mass–energy equivalence (revision), CC BY-SA 4.0. Photo : JTBarnabas, CC BY-SA 3.0, Wikimedia Commons.
