sciencecapsules

         Today, around 700 million cars  speed along our roads.      A tiny amount of high energy fuel, (petrol), trapped in a small, enclosed space (engine cylinder) and ignited will release an enormous amount of energy as the gas expands.  If this is done hundreds of times a minute, this energy can be harnessed to move a piston up and down.  Attaching what is known as a 'crank shaft' converts this motion to rotation.      American inventor ford recognised that the car was so expensive because it took so long to build.  With the advent of the industrial revolution, engineers realised the potential for speeding up the manufacturing process by getting different workers each to repeat their tasks over and over again.  Ford spotted that this so called 'assembly line' could be applied to car manufacturing.  The framework of the car moved along a line of workers, who each added a new part.  As the workers did not have to move around  the factory and become expert at a

         Dubai has trade and tourism based economy.  They go for world's top and best.  Hence there is no wonder in their attempt to build world's tallest building. FACTS AND FIGURES      It has 163 floors.  The total height is 829.8 m, nearly one kilometer .  It took 6 years for construction.  Each floor was completed in just three days time.  It can shelter 35000 people.  At any moment there are 10000 people in it.  It is the tallest free standing structure in the world.  It is constructed mainly using vertical concrete pumping.  1000 pieces of art will  adorn the interiors.  The exterior temperature at the top of the building is said to be 6 degree c cooler than its base.  A 304 - room Armani hotel occupies 15 lower floors.  It has 900 private residential apartments which according to the developer sold out within eight hours of being on the market.  The building has 57 elevators and 8 escalators.  The speed of the elevator is 10 m/s.  The building also has 2909 stai