a pipe carrying 20degrees of water has a diameter 2.5cm.Estimate the maximum flow speed if the flow must be streamline?

Answer 1

20°C water ==> density = ρ = 1000 kg/m³
r = d/2 = 0.0165 m
A = 0.000855 m²

Q = ΔV/Δt
Q = volumetric flow rate
ΔV = change in volume flowing through the area
Δt = time interval of volumetric flow

Also:
Q = v · A = vA cos θ
v = velocity field of the substance elements flowing
A = cross-sectional vector area/surface
θ = 0 ==> cos θ = 1

v = Q/A = Q/0.000855

Answer 2

bobpursley, you literally copy pasted Vader's answer from yahoo answers, really original working out lmao