Inventions In which decade were the first successful diode and triode vacuum tubes invented? 1800s 1880s 1900s 1890s 1800s 1880s 1900s 1890s ANSWER DOWNLOAD EXAMIANS APP
Inventions This African-American woman physical therapist worked with soldiers disabled in World War II. She invented a device that helped the disabled to eat by delivering food through a tube to a mouthpiece. Marjorie Joyner Mae Jamison Beulah Henry Bessie Blount Marjorie Joyner Mae Jamison Beulah Henry Bessie Blount ANSWER DOWNLOAD EXAMIANS APP
Inventions Who invented Dynamite? Benjamin Franklin Sir Alexander Graham Bell Thomas Alva Edison Alfred B. Nobel Benjamin Franklin Sir Alexander Graham Bell Thomas Alva Edison Alfred B. Nobel ANSWER DOWNLOAD EXAMIANS APP
Inventions The initials JCB on earth-moving equipment are those of the founder of the company that makes it. What is his name? John Christopher Baxter Joseph Cyril Bamford John Christopher Ballantyne Jack Croxford Baker John Christopher Baxter Joseph Cyril Bamford John Christopher Ballantyne Jack Croxford Baker ANSWER DOWNLOAD EXAMIANS APP
Inventions Which scientist discovered the radioactive element radium? Isaac Newton Albert Einstein Benjamin Franklin Marie Curie Isaac Newton Albert Einstein Benjamin Franklin Marie Curie ANSWER DOWNLOAD EXAMIANS APP
Inventions Who invented Bifocal Lens? Thomas Alva Edison Benjamin Franklin Alfred B. Nobel Rudolf Diesel Thomas Alva Edison Benjamin Franklin Alfred B. Nobel Rudolf Diesel ANSWER DOWNLOAD EXAMIANS APP
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