Smog is a kind of air pollution, originally named for the mixture of smoke and fog in the air. Classic smog results from large amounts of coal burning in an area and is caused by a mixture of smoke ... > more
Platinum is a chemical element in the periodic table that has the symbol Pt and atomic number 78. A heavy, malleable, ductile, precious, grey-white transition metal, platinum is resistant to ... > more
Manganese is a chemical element in the periodic table that has the symbol Mn and atomic number 25. Manganese is essential to iron and steel production by virtue of its sulfur-fixing, deoxidizing, and ... > more
Mass spectrometry is an analytical technique used to measure the mass-to-charge ratio of ions. It is most generally used to find the composition of a physical sample by generating a mass spectrum ... > more
Electrical engineering (sometimes referred to as electrical and electronic engineering) is a professional engineering discipline that deals with the study and application of electricity, electronics ... > more
Citric acid is a weak organic acid found in citrus fruits.
It is a natural preservative and is also used to add an acidic (sour) taste to foods and soft drinks. In biochemistry, it is important as ... > more
RADAR is a system used to detect, range, and map objects such as aircraft, ships, and rain. Powerful radio waves are transmitted, and a receiver listens for any echoes. By analysing the reflected ... > more