Physical Science

The differences between molecules and compounds have been observed and carefully described. Molecules are a group of two or more atoms that are electrically neutral and which are bonded together with very strong chemical bonds that are also called covalent…
Read more

Essentially, a compound is a type of molecule – so a compound is a molecule, but a molecule is not necessarily a compound. In chemistry, a molecule is defined as two or more atoms (the building blocks of all larger…
Read more

According to current theory, the formation of the planets of our solar system occurred as a result of collisions between increasingly large bodies of matter within a flattened cloud of matter circling the early Sun, known as a protoplanetary disk….
Read more

A nuclear-powered spaceship may propel the first manned mission to Mars. Anatoly Perminov the director of Roscosmos, the Russian counterpart of NASA, told the Russian news agency RIA that a joint Russian-US nuclear spacecraft project will be on the table…
Read more

Helium 3 (He-3) nuclei contain 2 protons and 1 neutron, unlike regular helium (He-4) nuclei, which contain 2 protons and 2 neutrons. He-3 is a light, non-radioactive isotope of helium and is very rare on the Earth, but relatively abundant…
Read more

The atmosphere of the earth is made up of gases which reside in layers of gas that surround the planet. In order to understand the gases of the atmosphere, it helps to know how the atmosphere is constructed and what goes…
Read more

Electric current relays work in conjunction with switches and are used to power electronic gadgets by starting them or stopping them (turning them on or off). Electricians use different types of relays to accomplish specific kinds of tasks, however, all…
Read more

The planet Venus is a ‘femme fatale’; beautiful and alluring, and yet secretive and deadly. Revered by the ancients and named by the Romans for their goddess of love and beauty, the Earth’s nearest neighbouring planet appears as a bright…
Read more

In all the episodes of the original “Star Trek” series, not once did Captain Kirk actually use the words: “Beam me up, Scotty!” It might be interesting to examine not only why he never said this, but also why he…
Read more

The fundamental difference between Alternating Current (AC) and Direct Current (DC) is this: DC is a steady and relatively unchanging flow of current through a circuit while AC is a dynamic, that is: a continuously changing flow of current through…
Read more