In which decade was the first solid state integrated circuit demonstrated?
1950s
1960s
1970s
1980s
What James Watt invented?
Diving bell
Hot air balloon
Rotary steam engine
Steam boat
Who invented Jet Engine?
Sir Frank Whittle
Gottlieb Daimler
Lewis E. Waterman
Roger Bacon
In which decade was the telephone invented?
1850s
1860s
1870s
1880s
Who perfected GENETIC ENGINEERING?
Jaysson & Simons
Sinclair & Roberts
Hunt & Davids
Cohen & Boyer
When was the first lawn mower invented?
1849
1835
1854
1830
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