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What is the relation between pi and circle mathematically?
A circle's circumference when divided by its diameter is the value of pi which is an irrational number because it can't be exactly expressed as a fraction.
What is the relationship between the exponent and the number of zeros?
what is the relation between number of zeros and exponents
Why you have to calculate hydraulic diameter to find Reynolds number?
The Reynolds number is the relationship between inertial forces (numerator) and viscious forces (demoninator). The terms in the numerator are usually the fluid density, velocity, and "characteristic" dimension (which has units of length). Depending on the type of problem you are trying to solve that characteristic dimension may be a length (flat plate problem) or a diameter (flow in a round tube), or hydraulic diameter (non-circular internal flow). Since a non-circular cross section has more surface area than a circular cross section area there needs to be a way to account for this difference. If you use the hydraulic diameter equation to calculate the hy. dia. of a circular cross section, you will get the diameter of the circle.
What is relation between math and environment?
Eulers number Approx x^2.31
Why did they need pi?
It is the ratio between a circumference of a circle and the diameter (they needed a number to describe this).
