Starting with Newton's Second Law, express the unit of slug in terms of ft, lb, and s. What are the units for Manning's roughness coefficient n, in units of m,

kg, and s? Manning's n appears, for example, in the SI-unit version of Manning's equation for velocity, V= (1/n)Rh2s2,where V= QIA is average velocity, Q is discharge [m³/s], Rn is hydraulic radius [m], and S is the dimensionless slope of the energy grade line (EGL).