From 39573003b286d03871c912b9950cc7d20033f7c8 Mon Sep 17 00:00:00 2001 From: eggy Date: Wed, 7 Apr 2021 13:06:00 -0400 Subject: [PATCH] phys: fix wind formula --- docs/sph4u7.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/sph4u7.md b/docs/sph4u7.md index ebab4f3..9795310 100644 --- a/docs/sph4u7.md +++ b/docs/sph4u7.md @@ -397,7 +397,7 @@ Moderators are used to encourage fission as they slow down neutrons that are goi The kinetic energy of wind can be harnessed to generate power. As convection currents provide the greatest airflow near large bodies of water, wind farms are often constructed there. The wind turns rotor blades which turn a turbine to generate power. It is a source of clean and renewable energy. Assuming **all wind kinetic energy** is converted to mechanical energy, where $P$ is the power generated, $A$ is the area of the circle that the blades spin around, $\rho$ is the density of the air, and $v$ is the speed of the wind in the direction of the blades: -$$P=\frac{1}{2}\rho v^3$$ +$$P=\frac{1}{2}A\rho v^3$$ (Source: Kognity)