Problem 6.1 A small stream was found to be contaminated with Lindane, a pesticide known to cause convulsions and liver damage. Groundwater wells in the same region have also been found to contain Lindane, and so you suspect that iver contamination is due to groundwater nflow. To test your theory you conduct a dye study. Based on the information given below, estimate the ground water volume flux, QGw, and the concentration of Lindane, CLGw, in the groundwater. Station 1: A 50-mg/l solution of tracer is njected at the rate of Q₁ = 100cm³/s. Station 2: Located 100-m downstream of Station 1. Dye concentration, Cdye = 10 µg/l Lindane concentration, C₁₂ = 0.5 µg/l Station 3: Located 200-m downstream of Station 1. Dye concentration, Cdye = 8 µg/l Lindane concentration, C₁3 = 0.9 µg/l

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Hydrogen Energy

Energy is a quantity that cannot be defined, its existence can only be felt. In simple language, if a system possesses energy, it can do a specific kind of work. There are many forms of energy sources which people can use to obtain work. Solar energy, tidal energy, hydroelectric energy, geothermal energy, wind energy are some of the renewable energy sources which are primarily used for the production of electricity.