Wednesday, 27 July 2011

Working Lunch

At lunch time SMAF students get to use SILC the Science Innovation Learning Centre for first year undergraduate science students.

Many of the students share ideas about what they have learnt in class while eating their lunch.

Different furniture than a normal classroom space.

Nickel Plating

Students were taught chemistry in a new lecture theatre in the physical sciences building today.
Anthony Armstrong Academy Chemistry teacher: teaching rates of reaction and electrochemistry
The students performed an electrolysis experiment later in the lesson. The students plated copper coins with nickel.


Copper coins : for those who remember

Nickel II ions (green in solution) were reduced to Nickel
by electricity forming a Nickel coating (silver looking) on the copper coins. 

Young's double slit

Students in physics investigated the distance between two very closely spaced slits in a double slit interferometer. They also had to measure the wavelength of an unknown source of light and observe the effect that a change in wavelength has on the interference pattern. Students observed the interference pattern produced by a source of white light.
Students using apparatus to collect data
Young's slit



Donna Riordan Academy Physics Teacher
explaining to students how the apparatus works.
Students learnt today about
transmission diffraction gratings.

Young's double slit apparatus

Friday, 22 July 2011

Physics Beams in Holiday Session

Today students attended SMAF for a physics holiday workshop.
The students started the day with a presentation from a scientist at Flinders University.



Dr Rachel Popelka-Filcoff is currently an AINSE (Australian Institute of Nuclear Science and Engineering) Research Fellow and Lecturer based at Flinders University. She has won numerous awards and presented her research on the application of neutron activation analysis to Aboriginal Australian artefacts. Dr Rachel Popelka-Filcoff is working with collaborators on a project to characterise ochre and related pigments from regional and national sources in Australia.  This project uses several elemental and spectroscopic techniques to "fingerprint" ochre and minerals from geological sources, and understand uses of the pigment on archaeological sites, artefacts and objects.
Her talk demonstrated the interdisciplinary nature of science and provided an authentic example of cross curriculum priorities with physics and Indigenous perspectives.
Dr Rachel Popelka-Filcoff
Photo by Ashton Claridge, Flinders University.  


Students participated in a number of activities to investigate the principles they had learnt by theory in their physics lessons. For example magnetic field produced by a current, motion of a charged particle in a magnetic field and a hand generator.
Student showing how angular momentum speeds up
and slows as he brings his arms in or
spread out carrying weights.


Centripital motion
The force on a current in a magnetic field
The current passes through a strip of aluminium foil. The movement of this foil shows the size and direction of the force.




The foil is placed in the magnetic field of a large permanent magnet and connected to the power supply.


The force between two currents
When the currents are in the same directions
the aluminium strips attract each another.
The force between two currents
When the currents are in opposite directions
 the aluminium strips repel one another.


Deflecting electron beams in a magnetic field





The deflection tube uses an electron gun to inject electrons into a region of nearly uniform magnetic field perpendicular to the beam. In this region a magnetic field acts on the charge, producing a uniform acceleration in the direction perpendicular to the magnetic field and to the velocity of the electrons. Each electron experiences an acceleration that is always at right angles to its velocity. You should recognise this as a recipe for circular motion by now.

Teltron Tube















Generating Electricity



Students tested how many amps they could produce.





Wednesday, 13 July 2011

Galvanising Holiday

Students enjoy learning chemistry in their holidays!
Revising electrochemistry
Copper Zinc Galvanic Cell
Students using multimeter to determine the number of Amps produced



Comparing galvanic cells

Iron II and Magnesium Galvanic Cells

Wednesday, 6 July 2011

Elephants Toothpaste

In chemistry today students learnt about collision theory and reaction rates.

First Anthony Armstrong (Academy Chemistry teacher) explained the collision theory and activation energy of reactions.

This was followed by Colin Grace (Academy Chemistry teacher) reinforcing the concepts through demonstrations.

1. Corn bomb explosion : showing the state of subdivision.

Light flame
First explosion: blink and you miss
For those who did not see the
explosion it was captured on video.
Trial 4 and BANG!
2. Elephant's toothpaste : Some reactions need a catalyst

3. How can we measure the rate of a reaction?
PINK -->

                                                  BLUE --> GREEN
Colour Change Gas evolved

Incandescent


This week in physics the class discussed antennas and how they send and receive signals.


sdsu-physics.org (image accessed 7/7/11)











They have now started looking at diffraction, diffraction through a single slit, Phase relationships, monochromatic light, coherent waves and Incandescent light sources. The class also went through constructive and destructive interference, superposition, two source interference and applied that to two slit interference.

                                                    

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