(Photo: Elkhorn Slough NERRS site). An estuary is a partially enclosed body of water, and its surrounding coastal habitats, where saltwater from the ocean mixes with fresh water from rivers or streams. In fresh water the concentration of salts, or salinity, is nearly zero.The salinity of water in the ocean averages about 35 parts per thousand (ppt).ruly, no two estuaries are the same. Yet they are typically classified based on two characteristics: their geology and how saltwater and fresh water mix in them. However, not all estuaries contain brackish waters. There are a small number of ecosystems classified as freshwater estuaries.
Plug Type F. Used in: Germany, Austria, the Netherlands and Spain among others (see complete list of countries on the right) The Type F electrical plug (also known as a Schuko plug) has two 4.8 mm round pins spaced 19 mm apart. It is similar to the Type E plug but has two earth clips on the side rather than a female earth contact.
Flyback DC/DC Converters. Flyback converters are one of the simplest DC-DC converter topologies to include electrical isolation. Although generally only viable for lower range power supplies (up to 100W), they do have a number of advantages.lyback DC/DC Converters. Flyback converters are one of the simplest DC-DC converter topologies to include electrical isolation. Although generally only viable for lower range power supplies (up to 100W), they do have a number of advantages.