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Water circulates throughout a house in a hot water heating system. If the water is pumped at a speed of 0.5 -- through a 2 cm
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Answer #1

equation of continuity

A1*V1 = A2*V2

pi*R^2 *V1 = pi *r^2*V2

( 2/2 *10^-2)^2*(0.5) = (1.3/2 *10^-2)^2*V2

((2/2)/10^2)^2×0.5 = ((1.3/2)/10^2)^2 v

V2 =1.18343 m/s

BY

Bemoullis equation is, 6- + pgh, = P + pve + pgh

3*10^5 + 1/2*1000*0.5^2 + 1000*9.8*0 = P + 1/2*1000*1.18343^2 +1000*9.8*5

3 10% + 1000 0.5° + 1000 9.8.0 = P+ - 1000 1.18343 + 1000 9.8.5

300 125 = P +49 700.3

from here

P≈250425. Pa answer

P =2.5*105 Pa  

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