EDUCATION       Education :- Computer :- SQL TUTORIAL :- Views EDUCATION :- English :- How Things Work   HOW DOES AN ESCALATOR TRANSPORT PEOPLE FROM ONE FLOOR TO ANOTHER ? HOW DO HELICOPTERS STAY ALOFT IN THE AIR ? HOW DOES A LASER WORK ? HOW DOES A PROJECTOR SHOW PICTURES ON SCREEN ? HOW DOES A RECORD PLAYER MAKE MUSIC ? HOW DOES A RIFLE FIRE A SHOT ? HOW DO ROCKETS GET INTO SPACE ? HOW DOES A SOLAR CELL PRODUCE ELECTRIC CURRENT ? HOW DOES A SOLAR COOKER COOK FOOD ? HOW DOES A SONAR UNIT WORK ? HOW DOES AN AEROPLANE GET INTO THE AIR ? WHAT TASKS DO ARTIFICIAL SATELLITES PERFORM ? HOW DO AUDIO TAPE RECORDERS WORK ? HOW DOES AND AUDIO TAPE RECORDER RECORD SOUND ? WHAT MAKES A BICYCLE GO ? HOW DOES A CAMERA TAKE A PICTURE ? WHAT MAKES A CAR RUN ? HOW TO DETERGENTS CLEAN ? HOW DOES AN ELECTRIC BULB GIVE LIGHT ? HOW DOES AN ELECTRIC LIFT WORK ? HOW DOES A DOOR LOCK WORK ?