Question

Write down the 5 invention and it's inventor from science book class 7​

Answer 1

Answer:

Alexander Graham Bell: Invented a dehusking machine, telephone , photophone, and made other technological discoveries which future inventors carried further.

Alfred Nobel: A detonator, Dynamite, Gelignite.

Benjamin Franklin: Lightning rod, bifocal glasses and many others.

Isaac Newton: Reflecting telescope and other discoveries.

Johannes Gutenberg: Designed and built the first printing press using movable type and mechanised ink. This helped print a large number of books at a lower cost for the first time.