## temperature, colour and line spectra

We’ve been looking at how the temperature of an object can affect it’s appearance.  The attached handout recaps on our work in class and provides some examples of line spectra.

## changing state – latent heat of fusion/vaporisation

Before the holidays, we performed a set of experiments to determine the latent heat of fusion and latent heat of vaporisation of water.  Next week, we’ll review that work and think about possible reasons why our results were not closer to the “book” values.

The attached pdf provides a summary of the topic.

## National 5 – Satellites

We’ve started looking at telescopes and this BBC programme from 2 years ago featured the replacement for Hubble, the James Webb Space Telescope.  The presenter, Maggie Aderin Pocock now hosts The Sky at Night on BBC4.

Please take some time to watch both parts of the film.  Maggie covers the basic idea of satellites, how we achieve geostationary orbit, looks at examples of Earth observation and the manufacture of the James Webb’s massive 6.5m mirror.  In part 1, around 17 minutes in, you’ll see satellite footage over the Highlands, can’t quite see Thurso though.

## extra nat5 revision materials

You can also use these notes to prepare for the test on Monday.  The test will cover everything up to page 46 in the attached file, but you can skip pages 39 & 40 on Newton’s third law.

Thanks to Mr Noble for sharing his notes.

## Nat5 revision materials D&S unit

Use these materials to help you prepare for the assessment at the start of next week.  Studying up to page 7 of the attached file will cover the topics in the test.

## Using Excel in AH Physics

You will need the attached file when we go to the library to learn about using Excel to crunch data for your project.

## capacitors

You recently completed the topic on capacitors in dc circuits, finishing off with a detailed study of the graphs obtained for current & voltage against time when a capacitor is charged or discharged through a series resistor. There are some additional notes and practice questions at the end of this post but please watch the embedded video clips first.

This introduction to capacitors from the nice people at Make Magazine is a good starting point.

The S-cool revision site has some helpful notes and illustrations on capacitor behaviour; try page 1 (how capacitors work) and page 2 (charging and discharging).

There is information on charging and discharging capacitors on BBC Bitesize.

Use your knowledge of capacitor behaviour to explain how a flashing neon bulb can be controlled using a capacitor & resistor arranged in series. Here is a short video introduction to help with that.

There are people working to replace heavy battery packs with modern, high capacitance devices called supercapacitors. These supercapacitors have superior energy storage compared to the normal electrolytic capacitors you will have used in class. This video goes one step further and shows the fun you could have with an ultracapacitor. Do not try this at home!

Of course, you can always make your own capacitor with paper and electrically conductive paint.

Finally, you looked at capacitors in ac circuits. You need to know that a capacitor will allow an ac current to flow. The current in such a circuit will increase as the current increases. Mr Mallon’s site has a revision activity about capacitors in ac circuits.

Now download the pdf below. It contains notes to help with your prelim revision and some extra capacitor problems.

Thanks to Fife Science for the original pdf from Martin Cunningham.

## waves & radiation revision notes

The unit assessment for the Waves & Radiation unit of National 5 is scheduled for next week.  These notes will be useful as you prepare for the test.

Thanks to Mr Noble for sharing these notes.