48 For an investigation a student poured a blue solution of Cuso, into a beaker. The student placed a shiny, silver-colored strip of zinc metal in the solution and observed the changes. Observations of an Investigation Zn Cuso, ZnSO4 Blue solution Zinc in blue solution Zinc in clear solution The student inferred that a chemical reaction occurred. What evidence supports this inference? F A dark solid formed on the zinc metal. G The zinc metal remained silver-colored and shiny. H The Cuso, solution turned blue when the zinc metal was added. None of these

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

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a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.