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A. An EMP, or electro magnetic pulse, is the electromagnetic radiation from a nuclear explosion. When a nuclear bomb explodes gamma rays are released which collide with air molecules producing
00:00 Mon 01st Oct 2001 Harrisonn, along with many people, is obviously concerned about the possibility of biological and chemical attack in the wake of the terrorist atrocities in America. The Government has stated
00:00 Mon 01st Oct 2001A. The different coloured toothpastes are made and fed into the tubes separately. The secret of keeping the stripes separate while the tube is filled is a special nozzle containing smaller pipes.
00:00 Mon 01st Oct 2001A. Originally, yes. Light dimming technology has been around for some time, although to start with it was used mainly in theatres. Originally devices that reduced the amount of voltage getting to
00:00 Mon 24th Sep 2001A. OTEC stands for ocean thermal energy conversion. Electricity is generated using the large temperature gap between warm surface and cold deep-sea water. Q. How does OTEC work A. There are a
00:00 Mon 24th Sep 2001A. Pacemakers generally speed up heartbeats that would otherwise be dangerously slow. Q. How do pacemakers work A. The pacemaker generates small electrical pulses that cause the heart to
00:00 Mon 24th Sep 2001A. It isn’t, although bees collect both pollen and nectar from flowers, only nectar is used in the honey making process. Q. How is the nectar taken back to the hive A. Pollen becomes stuck
00:00 Mon 17th Sep 2001A. Because the spider spins at least two different types of silk: sticky and not sticky. The spider uses non-sticky silk to form the spokes of its web, saving the sticky silk for the spirals that
00:00 Mon 17th Sep 2001A. TV signals are sent out between 500 and 800 MHz frequencies, depending on which channel is being transmitted. However your TV set tunes this frequency to an intermediate frequency of around 39
00:00 Mon 17th Sep 2001A. The appendix, technically known as the vermiform, which is Latin for ‘worm like’, is a small, finger shaped projection attached to the large intestine. Q. Does its removal affect
00:00 Mon 10th Sep 2001A. It doesn't suck, rather the victim sinks, as they would do in any other liquid. The myth about quicksand sucking people in probably springs from the fact that it's very thick, providing suction,
00:00 Mon 10th Sep 2001A. They stand for Intelligence Quotient, a phrase first coined by the German psychologist William Stern. Q. When did IQ tests start A. The French psychologist Alfred Binet invented intelligence
00:00 Mon 10th Sep 2001A. The main problem many people encounter is that having been on a diet and lost weight, once they go back to their normal eating habits the pounds pile on again. Most people gain weight because
00:00 Mon 03rd Sep 2001A. Because the pitch that your larynx, or voice box, produces is dependent on either its size or the speed that sound passes over your vocal cords. So you can change the pitch of your voice either
00:00 Mon 03rd Sep 2001A. Basically they're chemical substances that can, in low concentrations, either kill harmful microorganisms or curb their growth rate. This helps our immune systems' deal with disease or infection
00:00 Mon 03rd Sep 2001A. It’s not just any old sneeze, it’s a photic sneeze, to give it its official name. The photic sneeze has intrigued scientists for some time, starting with Francis Bacon back in the
00:00 Mon 27th Aug 2001A. The Dead Sea, in Jordan, is one of the world’s saltiest bodies of water, six times as salty as most oceans. Basically, oceans become salty through two actions: rivers, carrying mineral
00:00 Mon 27th Aug 2001A. Cryogenics is a branch of science dedicated to the freezing of objects, either as a method of preservation or as a means of improving their molecular structure. Cryogenics involves temperatures
00:00 Mon 27th Aug 2001A. The nozzle contains a small pipe that constantly sucks air from the end because it’s connected to a vacuum at the end of the hose. When your petrol tank is full, and the nozzle is actually
00:00 Mon 20th Aug 2001A. Because it causes our heart rate to slow down, preparing our body for sleep. The outer eyes contain the rectus muscles, which are responsible for moving our eyeballs. When you rub your eyes,
00:00 Mon 20th Aug 2001
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