The Unconscious Favouring of Extroversion in our Society
Youtube Video: "Susan Cain: The power of introverts"
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Rockets and Flight
Where were rockets first used and by whom? What were these early rockets used for? The first recorded use of rockets was by the Chinese, in the battle of Kai-Keng (The place is now known as Kaifeng) against the Mongols, in 1232. They were used as weapons (rockets mounted on arrows), which were used to repel, create a sense of fear and potentially injure and the Mongols. Explain the difference between the way a rocket achieves flight and the way an aeroplane does. An aeroplane achieves flight through the meticulous design of the wings that allow lift. Lift is created through these wings due to the fact that the top of the wing has a larger/longer surface area than the bottom of the wing (aerofoil design). This increases the speed of the moving air (above the wing) which decreases the pressure on top and combined with the thrust produced by the plane –through is engines- thus allowing the plane to “lift off”. The pressure underneath pushed the wing upwards resulting in fligh...
Safety and Cars
Special Investigation 11 – Safety Devices People using motor vehicles, bicycles or motorbikes use a number of safety device to improve their chances of survival in the event of an accident. Such devices are designed to either make an accident less likely to happen or to reduce the risk of injury or de ath id one does occur. Safety devices are now fitted as standard equipment on many motor vehicles and pushbikes. By far the most valuable and effective safety device for motor cars is the seat belt. Make a list of different types of safety devices used in or available for use in: a) Motor Cars: Brakes, seatbelt, windshield, front lights, rear lights, doors, horn, air bags, child lock, mud flaps, sun visors, external sun visors, windscreen washer, windscreen wipers, windscreen demisters, external mirrors, weather shields b) Motorbikes: Brakes, helmet, front lights, handle bars, rear lights, gloves, motorbike suits/protective clothing, cushion/seat c) Pushbikes: Brakes, hel...