If the diameter D is 2 inches, what is the IWRC value using the formula D^2 x 45?

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Multiple Choice

If the diameter D is 2 inches, what is the IWRC value using the formula D^2 x 45?

Explanation:
The IWRC value scales with the square of the diameter, using the rule: IWRC = D^2 × 45. With a diameter of 2 inches, D^2 is 4. Multiply by 45 and you get 180. So the IWRC value is 180 (in the units the formula uses). This also shows why a small increase in diameter has a noticeable effect: doubling the diameter from 1 to 2 inches would raise the IWRC from 45 to 180, a fourfold increase.

The IWRC value scales with the square of the diameter, using the rule: IWRC = D^2 × 45. With a diameter of 2 inches, D^2 is 4. Multiply by 45 and you get 180. So the IWRC value is 180 (in the units the formula uses). This also shows why a small increase in diameter has a noticeable effect: doubling the diameter from 1 to 2 inches would raise the IWRC from 45 to 180, a fourfold increase.

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