This means we are looking for shapes that fit together nicely, without any gaps or overlaps to create a pattern. Stacks of these strips cover a rectangular region and the pattern can clearly be extended to cover the entire plane. This easily gives us the result that: All squares tessellate.

The simplest polygons have three sides, so we begin with triangles: All triangles tessellate. The sum of angles of any triangle is 180°. Moving up from triangles, we turn to four sided polygons, the quadrilaterals.

SSS Similarity Theorem: If all three pairs of corresponding sides of two triangles are proportional, then the two triangles are similar. If ABYZ=BCZX=ACXY, then ΔABC∼ΔYZX.

While AAS quantifies the absorption of electromagnetic radiation by well-separated neutral atoms, AES measures emission of radiation from atoms in excited states.

Atomic absorption spectroscopy is studied using an atomic absorption spectrometer (AAS or AA spectrometer). The AA spectrometer works by:

1. Creating a steady state of freely dissociated ground state atoms using a heat source (flame)
2. Passing light of a specific wavelength through the flame.

1 Answer. Because it gives a very high temperature: 2200-2400 ∘C. This is due to its high heat of combustion, around 1300 kJ/ mol. If still higher temperatures are required, as for Al, Si, Ti, etc., a combination of acetylene and N2O is used, which reaches 2600-2800 ∘C.

In atomic absorption spectroscopy (AAS) element specific light absorption is used to determine the concentration of a metal in a solution. This mixture is combusted to reduce the elements of interest into free atoms that absorp light at a specific wavelength. …