#### C60+ in space – a 28-year detective story about the Diffuse Interstellar Bands – Part 5

It seems likely that C60+ will act as a stable site for a wide variety of adducts and that these entities will contribute to the Diffuse Interstellar Bands. John Maier's group in Basel is looking for species like C60(Fe)+.

More details | Watch now#### C60+ in space – a 28-year detective story about the Diffuse Interstellar Bands – Part 4

The early (mid 1990s) work on the electronic spectroscopy was carried out by John Maier's group, trapping C60+ in a neon matrix in this apparatus.

More details | Watch now#### C60+ in space – a 28-year detective story about the Diffuse Interstellar Bands – Part 3

John Maier's team at the University of Basel solved the riddle of C60+ in 2015. In this brief view Colin Byfleet looks at the unique apparatus used in John's work.

More details | Watch now#### Centripetal force – how do we measure it?

A short video showing a simple classroom method of checking the way in which this force is related to mass, speed and radius.

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A presentation showing both the ideas about centripetal force and a simple classroom method of checking the way in which this force is related to mass, speed and radius.

More details | Watch now#### Measuring the speed of pulses

A short clip showing the experimental measurement of the speed of electrical pulses in a cable - a large fraction of the speed of light.

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A presentation showing how to measure the speed of sound over a short distance on a laboratory table.

More details | Watch now#### Measuring the speed of sound – experimental details

A short clip showing the measurement of the speed of sound over short distances.

More details | Watch now#### Constructing Chemical Formulas

An introduction to constructing and recognising chemical formulas. Using 20 well-known elements, the valency-rules which govern the atomic ratios are explained and used with several examples.

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An introduction into the writing down of fully balanced chemical equations. The process is explained starting with word equations, finding all the relevant formulas and then working with some useful rules for finding the correct coefficients in the b....

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The concept of oxidation and reduction is explained and generalised using oxidation numbers with ionic and covalent examples. Several equations are balanced, using the oxidation number method to fix various atomic ratios.

More details | Watch now#### Communication with Space Probes and beyond

The main problems associated with communicating with distant space probes like Voyager 1 are investigated. The role played by diffraction in limiting the amount of power receivable on Earth is discussed. The further problems of reaching a nearby st....

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