Inventions Who invented Bifocal Lens? Benjamin Franklin Alfred B. Nobel Rudolf Diesel Thomas Alva Edison Benjamin Franklin Alfred B. Nobel Rudolf Diesel Thomas Alva Edison ANSWER DOWNLOAD EXAMIANS APP
Inventions What James Watt invented? Rotary steam engine Hot air balloon Diving bell Steam boat Rotary steam engine Hot air balloon Diving bell Steam boat ANSWER DOWNLOAD EXAMIANS APP
Inventions When was the toothbrush invented? 1770 1790 1742 1765 1770 1790 1742 1765 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? Jack Croxford Baker Joseph Cyril Bamford John Christopher Baxter John Christopher Ballantyne Jack Croxford Baker Joseph Cyril Bamford John Christopher Baxter John Christopher Ballantyne ANSWER DOWNLOAD EXAMIANS APP
Inventions What is the name of the CalTech seismologist who invented the scale used to measure the magnitude of earthquakes? Giuseppe Mercalli Charles Richter Joshua Rumble Hiram Walker Giuseppe Mercalli Charles Richter Joshua Rumble Hiram Walker ANSWER DOWNLOAD EXAMIANS APP
Inventions In which decade was the transistor invented? 1960s 1940s 1950s 1980s 1960s 1940s 1950s 1980s ANSWER DOWNLOAD EXAMIANS APP
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