By: Heather Brennan
Arsenic: Is there any better way to subtly do away with your enemies? Everyone from Nero to the Borgias to Agatha Christie has been a fan of it at some point in time. In the literary world arsenic remains one of the most popular poisons...
By: Santano Mccalla
Brownian Motion is the phenomenon whereby particles suspended in a fluid move in stochastic (i.e., pseudo-random) paths resulting from their bombardment by the fast moving atoms or molecules in the fluid, even if it is calm. In order for these kinetic impacts to take...
In physics, what is the difference between a mixture and a compound?
By: Francis Harris
Compounds and mixtures are easy concepts to understand. Chemically the difference between them lies in their atoms and whether the atoms of different elements are chemically joined (compound) or just mingled (mixture) together. This chemical difference affects how compounds and mixtures may be separated back...
In physics, what is the principle of moments?
By: Francis Harris
In physics the concept of moments has nothing to do with time but is rather a measure of the energy in a system. Moments, or the torque of a force, about a turning point are measured in Newton meters (Nm). Moments capture the turning effect...
By: Christyl Rivers
Earth is a rocky planet, just like the other first four planets orbiting Sol, Earth's sun. But Earth is definitely unique due to the vast variation of life on Earth. It is possible that some of the nearby neighboring planets, notably Venus and Mars, may...
Element facts: Lithium
By: Alison Bowler
The element Lithium (Li) is found in period 2 and group 1 of the periodic table. Group 1 is also known as the alkali metal group and in addition to lithium includes sodium, potassium, rubidium, cesium and francium. It is a soft metal and can...
Element facts: Lithium
By: Retha Boswell
Lithium (Li) is an alkali metal discovered in 1817 by Johann Arfvedson, given the atomic number 3. Its name comes from “lithos,” the Greek word for “stone,” because it was first discovered in a mineral source rather than a plant source...
By: Shaheen Daad
Brownian motion occurs when very small particles suspended in the fluid, seen under a microscope, appear to follow a zigzag trajectory of a totally random nature. Usually a phenomenon in science is not named for one who merely observes it, but is reserved for the...
In physics, what is the difference between a gas and a vapor?
By: Santi Meintjes
Firstly, although the words may be used interchangably by the average non-scientist person, there seems to be agreement in the scientific literature that gases and vapors are definitely not the same thing. For example, there is such a thing as a “gas-vapor phase equilibrium&rdquo...
By: Retha Boswell
Lead is classified as one of the “other metals.” All of the other metals have qualities of malleability and ductility. They are similar to the transition elements, but do not have varying oxidation states, and their valence electrons only exist in their outer...

 

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