. Level curves (isothermals) are shown for the water tempera-ture (in C) in Long Lake
Chapter 9, Problem 29(choose chapter or problem)
. Level curves (isothermals) are shown for the water tempera-ture (in C) in Long Lake (Minnesota) in 1998 as a functionof depth and time of year. Estimate the temperature in thelake on June 9 (day 160) at a depth of 10 m and on June 29(day 180) at a depth of 5 m.20 1615120Depth (m)10128812 16 2050160 200Day of 1998240 280
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