WATER RESOURCES ENGINEERING: Evaporation The temperature and relative humidity values for the month of October are: Mean air temperature at 4 m = 18o C Maximum lake temperature = 13.5o C Maximum pan temperature = 15o C Relative humidity = 35% Determine the monthly evaporation from the lake (in cm) using the Energy Balance Method. The average net radiation is 90 W/m2. Disregard sensible and ground heat fluxes.

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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.