Using Penman-Kohler Nomograph, determine the daily evaporation from a lake for a day during which the following mean values were obtained: Daily air Temperature = 78°F Dew point Temperature = 62 °F Wind speed = 8 mph (192 mpd) Daily solar radiation = 700 calories/cm²

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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.