Comments on: Dorothy is up on her 15-m x 15-m roof enjoying the view of Kansas. Suddenly, a strong wind blows down her? http://diy-solarpanels.net/air-x-wind/dorothy-is-up-on-her-15-m-x-15-m-roof-enjoying-the-view-of-kansas-suddenly-a-strong-wind-blows-down-her Build your own solar panels for less then $200! Mon, 06 Feb 2012 12:56:59 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: lawomicron http://diy-solarpanels.net/air-x-wind/dorothy-is-up-on-her-15-m-x-15-m-roof-enjoying-the-view-of-kansas-suddenly-a-strong-wind-blows-down-her/comment-page-1#comment-511 lawomicron Mon, 30 Nov 2009 05:54:59 +0000 http://diy-solarpanels.net/air-x-wind/dorothy-is-up-on-her-15-m-x-15-m-roof-enjoying-the-view-of-kansas-suddenly-a-strong-wind-blows-down-her#comment-511 Looks like you need to use Bernoulli's equation which is, er.... the sum of kinetic energy, pressure x volume and gravitational potential energy = constant. so it must be something like v^2/2 + p/d + gh = constant v = velocity, p = pressure, d = density, g = gravitational acceleration, h = height. velocity of air in the house is zero. the pressures are unknown, but you only need the difference between inside the house and outside. If necessary assume 1 atmosphere for the air in the house. height is approximately the same on the two surfaces of the roof so you can ignore this term. That should be enough to solve it.<br><b>References : </b><br> Looks like you need to use Bernoulli’s equation which is, er….

the sum of kinetic energy, pressure x volume and gravitational potential energy = constant.

so it must be something like

v^2/2 + p/d + gh = constant

v = velocity, p = pressure, d = density, g = gravitational acceleration, h = height.

velocity of air in the house is zero.
the pressures are unknown, but you only need the difference between inside the house and outside. If necessary assume 1 atmosphere for the air in the house.
height is approximately the same on the two surfaces of the roof so you can ignore this term.

That should be enough to solve it.
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]]> By: braille http://diy-solarpanels.net/air-x-wind/dorothy-is-up-on-her-15-m-x-15-m-roof-enjoying-the-view-of-kansas-suddenly-a-strong-wind-blows-down-her/comment-page-1#comment-510 braille Mon, 30 Nov 2009 05:39:59 +0000 http://diy-solarpanels.net/air-x-wind/dorothy-is-up-on-her-15-m-x-15-m-roof-enjoying-the-view-of-kansas-suddenly-a-strong-wind-blows-down-her#comment-510 nice try. are u looking for help with ur physics homework? sorry i did that 11 years ago. it hurts my brain having to figure this out. hope someone else can help.<br><b>References : </b><br> nice try. are u looking for help with ur physics homework? sorry i did that 11 years ago. it hurts my brain having to figure this out. hope someone else can help.
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