What is "c" in E=mc^2?

thermodynamic free energy
specific heat capacity
speed of light
Coulomb, unit of the electric charge
In words, energy equals mass mul­ti­plied by the speed of light squared.

Answers distribution

thermodynamic free energy
specific heat capacity
speed of light
Coulomb, unit of the electric charge
answers
flagthe United Arab Emirates
0%
9%
90%
0%
11
flagCanada
7%
7%
85%
0%
14
flagthe United States
3%
4%
83%
3%
131
flagPakistan
8%
8%
83%
0%
12
flagthe United Kingdom
8%
8%
78%
5%
137
flagUnknown
11%
13%
75%
0%
36
flagFrance
10%
5%
73%
10%
19
flagIndia
9%
6%
70%
9%
72
flagPoland
10%
13%
69%
5%
4300
flagGermany
9%
7%
67%
13%
52
flagthe Philippines
20%
20%
30%
30%
10

Gender

men71%
women56%
thermodynamic free energy
10%
13%
specific heat capacity
10%
21%
speed of light
71%
56%
Coulomb, unit of the electric charge
7%
7%

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What is "c" in E=mc^2?
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Author: Paweł Kołodziejczyk
Illustration: DonkeyHotey
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