P339 4-Tel 339 Fri 3 Nov C4 23:11:47 INFORMATION SERVICE *"££"£!££"££"!"!££"££ There has been a mjrgjr between the Channel 4 Science Club and the Science Line. Subscribers will get: * News about forthcoming TV and radio science programmer * Specially arranged lectures/jvjnts * Free calls to Science Line 1/7 Credit card details follow... 4-Tel's index to Channel 4...... 300 Next page C4 Today Previews + SubtitlesP339 4-Tel 339 Fri 3 Nov C4 23:32:31 INFORMATION SERVICE *"££"£!££"££"!"!££"££ *£££££££££-,,,,,,,.££££££-,,,,,.££££-,& To subscribe, send a chjquj/PO for £10 payable to BUS (former Science Club members quoting old membership number pay £9) to: Science Information Service PO Box 4000 Cardiff CF5 2XT For further details and to subscribe using the credit card hotline, ring: 01222 575444 (Office hours only) 2/7 How to call the Science Line... Preview/Information Index....... 310 Next page C4 Today Previews + SubtitlesP339 4-Tel 339 Fri 3 Nov C4 23:27:02 INFORMATION SERVICE *£££££££££-,,,,,,,.££££££-,,,,,.££££-,& Science Line is an information service for anyone with an inquiring mind. You can obtain answers to any questions on science, technology and medicine and the answer is only a phone call away. If you have any questions and wish to talk to a scientist, you can phone Science Line on 0345 600 444. Calls are at local rates and the lines are open 1.00-7.00pm Monday-Friday. 3/7 How to call the Science Line... Preview/Information Index....... 310 Next page C4 Today Previews + SubtitlesP339 4-Tel 339 Fri 3 Nov C4 23:24:12 *£££££££££-,,,,,,,.££££££-,,,,,.£££££££ 4/7 Kaboom! Sunday, Novjmbjr 5 19.00-20.00 Guy Fawkes night is upon us and BANG! Equinox investigates the ultimate chemical reaction - the explosion. Who invented gun powder? Gunpowder was discovered accidentally by the Chinese in the ninth century, while they had been looking for the elixir of life. Paradoxically, they stumbled upon something destined to end the lives of millions of people. Subtitles 888 NICAM stereo Next page C4 Today Previews + SubtitlesP339 4-Tel 339 Fri 3 Nov C4 23:34:04 *£££££££££-,,,,,,,.££££££-,,,,,.£££££££ 5/7 Kaboom! Sunday, Novjmbjr 5 19.00-20.00 The warfare applications were soon sjizjd upon, and by the time it appeared in the west, the Chinese had carried its djvjlopmjnt through many stages - perfecting the barrel gun and the cannon. What does gunpowder contain? There are only three main ingredients but they have to bj mixed in exactly the right proportion. They are: Saltpeter (potassium nitrate), sulphur and carbon. Subtitles 888 NICAM stereo Next page C4 Today Previews + SubtitlesP339 4-Tel 339 Fri 3 Nov C4 23:44:43 *£££££££££-,,,,,,,.££££££-,,,,,.£££££££ 6/7 Kaboom! Sunday, November 5 19.00-20.00 What is an explosion? An explosion is essentially a rapidly exothermic (heat-generating) reaction which produces large quantities of gases. The large amount of heat given off speeds up the reaction and also means that the gases expand. Subtitles 888 NICAM stereo Next page C4 Today Previews + SubtitlesP339 4-Tel 339 Fri 3 Nov C4 23:11:11 *£££££££££-,,,,,,,.££££££-,,,,,.£££££££ 7/7 Kaboom! Sunday, November 5 19.00-20.00 What makes something explosive? Many nitrogen containing compounds are explosive. The reason for this is that they contain a large bond between two nitrogen atoms which is packed with energy. As this bond breaks, the energy is given out as heat and nitrogen gas forms and quickly and explosively expands - Kaboom! Subtitles 888 NICAM stereo Next page C4 Today Previews + Subtitles