What did the invented that we don't use?

What will happen if more bulbs are added to a circuit with one cell? Can use 7.5mfd capacitor for a 5mfd capacitor? What is the difference between Script and Query? Datatypes what r types of datatypes? What would happen if you got caught using a Nintendo 64 emulator and roms? What is the concrete and abstract noun of the sentence The first inventions were based on the need for food and protection? Define C Fever as it applys to the ABC Priority method? How do you re-season cast iron pans? What is a breakdown current of a 50kva transformer? How do they make microchips? Irrigation Systems? Vapor barrier over studs and insulation and behind drywall or over drywall? What are simple machines in glasses you wear? Why is there a 12 in the Kruskal-Wallis Formula? What is a crawl foundation in construction? Can run a java script code in a stand alone computer? What is the most common way to demolish a building? Why doesn't the main function need a prototype statement? What kind of metal that are known as Inorganic materials? What can cause genetic variation?