Most physicists believe that our universe began with a Big Bang. But how did the laws of nature – for example, the strength of gravity, the speed of light, and the stre ...

Newton's Law of Universal Gravitation is written as: \(F=G\frac{m_1m_2}{r^2}\) The constant of proportionality is the universal gravitational constant ("big G") which equals \(6.674\times{10^{- 11}} ...