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Energy and Mass in Relativity Theory
The problem of fundamental units is discussed in the context of achievements of both theoretical physics and modern metrology. On one hand, due to fascinating accuracy of atomic clocks, the traditional macroscopic standards of metrology (second, metre, kilogram) are giving way to standards based on fundamental units of nature: velocity of light c and quantum of action h. On the other hand, the poor precision of gravitational constant G, which is widely believed to define the "cube of theories"doi:10.1142/9789812814128_0021 fatcat:uztqfat5hbceljdm374ypk2vie