I just came across this summarising Ian Stewart’s book on **17 Equations That Changed The World** at **Business Insider****:**** **

seventeen equations

I have used all of these up to Equation 12. I have never used the equations on Relativity or Schrodinger’s equation or those on Chaos or Information theory or the Black-Scholes Equation. But, I wouldn’t disagree with Equations 12 – 17, but considering the amount of time I spent applying it at University and during my working life I would have liked to see Bernoulli’s Equation on the list:

where:

- is the fluid flow speed at a point on a streamline,
- is the acceleration due to gravity,
- is the elevation of the point above a reference plane, with the positive
*z*-direction pointing upward – so in the direction opposite to the gravitational acceleration,
- is the pressure at the chosen point, and
- is the density of the fluid at all points in the fluid.

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