Inventions In which decade were the first successful diode and triode vacuum tubes invented? 1900s 1800s 1880s 1890s 1900s 1800s 1880s 1890s ANSWER DOWNLOAD EXAMIANS APP
Inventions Who synthesized the first wholly artificial gene? Benjamin Franklin J.J. Thompson Hargobind Khorana Meghnad Saha Benjamin Franklin J.J. Thompson Hargobind Khorana Meghnad Saha ANSWER DOWNLOAD EXAMIANS APP
Inventions Which scientist discovered the radioactive element radium? Marie Curie Isaac Newton Albert Einstein Benjamin Franklin Marie Curie Isaac Newton Albert Einstein Benjamin Franklin ANSWER DOWNLOAD EXAMIANS APP
Inventions When were bar code scanners invented? 1950s 1960s 1940s 1970s 1950s 1960s 1940s 1970s ANSWER DOWNLOAD EXAMIANS APP
Inventions Who invented Fountain Pen? John J. Loud Kirkpatrick Macmillan Lewis E. Waterman Sir Frank Whittle John J. Loud Kirkpatrick Macmillan Lewis E. Waterman Sir Frank Whittle ANSWER DOWNLOAD EXAMIANS APP
Inventions What Thomas Davenport invented? Sleeping (railway) car Screw propellor Chesterfield Electric streetcar Sleeping (railway) car Screw propellor Chesterfield Electric streetcar ANSWER DOWNLOAD EXAMIANS APP
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