Thursday, 14 April 2011

Physics blows air along a linear track

Linear motion is the basic of all motions. If uninterrupted, objects will continue to move in a straight line indefinitely although under every day circumstances gravity and friction conspire to bring objects to rest.

Motion is described in terms of   displacement (x), time (t), velocity (v), and acceleration (a). 

In physics this week students investigated linear motion. They investigated displacement vs time using linear air tracks.

Some students have set up a facebook page to discuss questions from their assignments and investigations.

Chemistry is Kool

The students in chemistry this week had a two hour analytical chemistry workshop.

In the first activity students separated different coloured dyes in grape Kool-Aid using column chromatography.

The stationary phase in the column was made of Sep-Pak C18 cartridge, which is very non-polar. Water, and different percentages of isopropyl alcohol were passed through the column. The ingredients of grape Kool-Aid were separated in the order of citric acid, red dye and blue dye.  The students were asked about the polarity of the solutions.

Thank you to Brent Banham Science Communication Officer at flinders University for providing the workshop for the students.

Wednesday, 6 April 2011

Chemistry offers some TLC

This week in chemistry students discovered the use of thin layer chromatography to identify the analgesic present in a non-prescription sinus medication.

Students crushed 4 different analgesic tablets: Panadol (acetoaminophen), Aspirin (acetyl salicylic acid), Aleve (naproxen), and unknown (X)

The tablets were then dissolved in a suitable solvent. Students pencilled a starting line across the thin layer chromatography (TLC) plate made of silica gel. 

Using a capillary dropper they made a spot on the starting line for each analgesic and the unknown. 

 They then placed the TLC plate  
  in the developing solvent until 
  the solvent front was 1 cm from
  the top of the plate.

Students then placed their TLC plate under UV light, and calculated Rf values. They then determined the anagelsic present in the unknown sinus medication.

Sunday, 3 April 2011

Physics students study rotational motion.

Academy students investigating in the first year undergraduate physics lab
Students changing parameter : velocity
Students changing parameter : radius on rotational motion apparatus
On Wednesday 30th March, the Year 12 Science and Maths Academy at Flinders physics students investigated circular motion using the rotational motion apparatus designed and built by the chemical and physical Sciences technical staff in the first year physics undergraduate laboratory. The Academy students could collect data needed to study variables affecting rotational motion. There were a number of parameters that could be changed and measured. These included, velocity, radius, mass and force.


Cluster Map