The pressure rise p associated with wind hitting a window of a building can be
estimated using the formula p = rho(v2
/2), where rho is density of air and v is the speed of the
wind. apply the grid method to calculate pressure rise for rho = 1.2 kg/m3
and v = 100 km/h.
a. express your answer in pascals.
b. express your answer in meters of water column (m-h2o).


i think it is the last one

Step-by-step explanation:

Check your answer if unsure

a)P=462.70 Pa

b)h = 0.047 m of water


Given that

Pressure ,P=\dfrac{1}{2}\rho V^2

\rho = 1.2\ kg/m^3

V= 100 km/h

V=100\times \dfrac{1000}{3600}\ m/s

V=27.77 m/s

The pressure P

P=\dfrac{1}{2}\rho V^2

P=\dfrac{1}{2}\times 1.2\times 27.77^2\ Pa

P=462.70 Pa

We know that density of the water \rho=1000\ kg/m^3

Lets height of the water column = h m

We know that

_P=\rho _w g h

462.70 = 1000 x 9.81 h

h=\dfrac{462.7}{1000\times 9.81}\ m

h = 0.047 m of water

a)P=462.70 Pa

b)h = 0.047 m of water

Do you know the answer?

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