3) In hardware design, a prototype is a hand-built model that represents a manufactured (easily replicable) product sufficiently for designers to visualize and test the design. The word prototype comes from the Latin words proto, meaning original, and typus, meaning form or model.
In chemistry, a salt is an ionic compound which is made up of two groups of oppositely charged ions. The ion with a positive charge is called a cation, and the one with a negative charge is called an anion.
Salt is one of the most widely used spices in the world and perhaps one of the most essential, both for its mineral properties and ability to bring out the flavour of other ingredients. There are several types of salt you can buy, with table salt, sea salt and rock salt being most common.Table salt is refined salt that has had most of its trace minerals removed to leave almost pure, bright white, sodium chloride.Table salt often contains additives, particularly iodine, and is typically the most economical salt one can buy.able salt is refined salt that has had most of its trace minerals removed to leave almost pure, bright white, sodium chloride. Table salt often contains additives, particularly iodine, and is typically the most economical salt one can buy.