:during a heavy rainstorm, water from a parking lot completely fills an 18-in.- diameter, smooth, concrete storm sewer. if the flowrate is 10 ft3/s, determine the pressure drop in a 100-ft. horizontal section of the pipe. repeat the problem if there is a 2-ft. change in elevation of the pipe per 100 ft. of its length.

Answer

diameter of parking lot = 18 in

flowrate = 10 ft³/s

pressure drop = 100 ft

using general equation

taking f = 0.0185

at Z₁ = Z₂

ΔP = 0.266 psi

b) when flow is uphill z₂-z₁ = 2

c) When flow is downhill  z₂-z₁ = -2

the equation above shows how temperature f, measured in degrees fahrenheit, relates to a temperature c, measured in degrees celsius. based on the equation, which of the following must be true?

a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of

5

9

degree celsius.

a temperature increase of 1 degree celsius is equivalent to a temperature increase of 1.8 degrees fahrenheit.

a temperature increase of

5

9

degree fahrenheit is equivalent to a temperature increase of 1 degree celsius.

a) i only

b) ii only

c) iii only

d) i and ii only