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This photograph shows an upper unit with fragments and a lower unit with tilted layers. Which of the following statements is true?
A. the upper unit is younger because it is on top
B. the upper unit is younger because it contains pieces of the underlying unit
C. the lower unit is older because it was tilted and eroded before deposition of the upper unit
D. all of these
Manning equation computes the flow speed V (m/s) in a canal made from unfinished concrete, given the hydraulic radius Rh (m), the channel slope S0, and a Manning resistance coefficient constant value n=0.014. For a canal with Rh=7.5 m and a slope of 1/10, find the flow speed. Compare this result with that obtained using the same n value, but with Rh first converted to ft, with the answer assumed to be in ft/s. Finally, find the value of n if we wish to correctly use the equation for BG units (and compute V to check!).
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