PROBLEMS TO BE WRITTEN UP AND TURNED IN AT RECITATION

     This problem is due at your first recitation meeting after Mon 01/31.
     The problem should be written on a single sheet of paper (front and back), 
     or if multiple sheets are used, staple them together.  For full credit,
     the work must be neat, with clearly labeled diagrams.  The labels must
     be in BOTH words and symbols.  For each part, you must BRIEFLY explain
     your strategy in words, as well as neatly showing your physics equations
     and math, with proper units. 

         Halliday and Resnick - 2nd Edition - CHAPTER 25 (10 points)
          1.  Water in an irrigation ditch of width w = 3.22 m and
              depth d = 1.04 m flows with a speed of 0.207 m/s.  The
              mass flux of the flowing water through an imaginary
              surface is the product of the water's density (1000 kg/m^3)
              and its volume flux through that surface.  Find the mass
              flux through the following imaginary surfaces:  (a) a
              surface of area wd, entirely in the water, perpendicular
              to the flow;  (b) a surface with area 3wd/2, of which wd
              is in the water, perpendicular to the flow;  (c) a surface
              of area wd/2, entirely in the water, perpendicular to the 
              flow;  (d) a surface of area wd, half in the water and 
              half out, perpendicular to the flow;  (e) a surface of
              area wd, entirely in the water, with its normal 34 degrees
              from the direction of flow.