The gravitational constant, G, is utterly important for any engineer. It is approximately 6.674×10−11 m3⋅kg−1⋅s−2 and helps determine the force between two masses. It appears in Newton‘s law of universal gravitation and Einstein‘s general theory of relativity. According to Newton, it is the proportionality constant connecting the gravitational force between two bodies with the product of their masses and the inverse square of their distance.
Becca Hirsbrunner photographed this fabulously constructed Z proportions letter. Interestingly, every element but the diagonal bar can be rationalized.