/ Ask The Fact Monster / Inventions / Inventions Ask The Fact MonsterMore Questions Jump to a category: - Any -AnimalsArtsAstronomyAwardsCalendarCivicsCountriesFoodGeographyHistoryHumanityIndexInventionsLanguageLiteratureMathMiscellanyMoneyMoviesNaturePeoplePresidentsRace genderReligionScienceSportsTelevisionU.S. CitiesU.S. HistoryU.S. StatesU.S. StatisticsWeather When was the Heimlich maneuver first demonstrated? Who was the first person to be cremated in the U.S.? Who invented the ambulance vehicle? Why do trains have emergency cords available to the public? Is there EVER a case where a passenger pulling the cord would be the right course of action? When were contact lenses invented? What were the first U.S. cities linked by a transcontinental phone line? What product was the first to be purchased by scanning its barcode? Can you tell me what year and what model of car was the first to have a heater installed? A project I am working on for this class requires that I know the exact distance between the grooves on a CD. I've looked everywhere, and I cannot find this information. I was hoping that you could tell me what the distance is, or at least where I could find such information on the Internet. Pagination First page « First Previous page ‹ Previous Page 1 Current page 2 MoreFeaturesGamesPollsTimelinesQuizzes
