Physical Science

What  is a  dilution? A dilution is a reduction in the concentration of a solution. This will include a stock solution (solution to be reduced) and a Diluent (reducing agent eg distilled water). To calculate the new concentration of a…
Read more

Mercury is an element which is the only metal that is a liquid at standard atmospheric pressure and temperature. This has earned it the nickname quicksilver, owing to the way the liquid mercury flows quickly across surfaces it has been…
Read more

Niels Bohr proposed a model for the hydrogen atom where the negatively charged electron is attracted to the positively charged proton. Bohr said that electrons move in fixed orbits around the nucleus of the atom. This model is called the…
Read more

Sapphires are known for their deep, blue color and romantic history. The gemstone is associated with royalty, and in fact many of these stones can be found in the crowns of European royalty, as well as in the gem collections…
Read more

An element in different form is called an isotope. Cesium-137 is a radioactive isotope which is produced during nuclear fission.   It is different from the Cesium, a non-radioactive element which has atomic mass of 133. Cesium-137 has an atomic mass of…
Read more

The geocentric model of the solar system (and indeed of the universe) asserts that the earth sits, unmoving, at the centre of all existence. Every other object in the sky revolves around the earth, following paths dictated by a variety…
Read more

LSD, also known as Lysergic Acid Diethylamide is a potent hallucinogenic drug, which is also called a psychedelic drug. Lysergic acid was first discovered in Switzerland in 1083. LSD is sensitive to oxygen, ultraviolet light, and chlorine, especially in solution,…
Read more

Let me state first and foremost, I don’t have a clue how many “astronauts” there are on Earth these days. Not everyone of them can be a Neil Armstrong or a Buzz Aldrin. Now that the use of the shuttles…
Read more

Over 4000 chemicals are found in tobacco smoke, and a minimum of 50 of these are carcinogens (as in chemicals that cause cancer). Out of these 50, 11 are a definite cause of cancer in humans, 7 probably do but it…
Read more

Obtaining valuable treatments for infection from our natural environment is well known, after all penicillin came from a fungus. This is an overview of a study to find fungicidal agents in scorpion venom. Fungi capable of causing disease in plants,…
Read more