Answer :

To find the nozzle reaction for a fog nozzle, you can use the formula:

[tex]\[ \text{NR} = 1.57 \times D^2 \times P \][/tex]

Here's a step-by-step explanation of the formula:

1. NR (Nozzle Reaction): This is the force exerted by the nozzle due to the flow of water or fluid. It is what you want to calculate.

2. D (Diameter of the Nozzle): This is the diameter of the nozzle opening, usually measured in inches. It's important because the size of the opening affects the flow rate and therefore the reaction.

3. P (Pressure): This is the pressure of the water or fluid flowing through the nozzle, usually measured in psi (pounds per square inch).

Steps to use the formula:
- Square the diameter (D) of the nozzle. This means multiplying the diameter by itself.
- Multiply the squared diameter by the pressure (P).
- Finally, multiply the result by 1.57 to find the nozzle reaction (NR).

This formula is specifically designed to calculate the nozzle reaction for a fog nozzle based on its diameter and the pressure of the fluid. If you have the values for D and P, you can plug them into this formula to find NR.

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Rewritten by : Barada