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  Scientists have proved that apart from the three states of matter which are known to them, namely solid, liquid and gas, there is a fourth type known as plasma. It does not exist naturally on earth. When a gas is heated to very high temperature, tremendous amount of energy is transferred to the atoms which ionize into its basic components, nuclei and electrons. Plasma is known to be an excellent electric conductor. Plasma cutters work by passing a gas through a narrow  Our Social Profile  opening and bringing this in contact with an electric arc. The gas used can be nitrogen, oxygen, argon or compressed air. This causes the temperature of the gas to rise astronomically resulting in the production of plasma. This high energy released is passed to the metal under operation by the electrical conductivity property of plasma. Since the plasma is basically a fluid, it has the capacity to clear the metal surface devoid of the residue produced from the cut. The main drawback of...