state gov Chhatisgarh (CG) Police Constable Mock Test 2023-24 General Knowledge Science Technology and Inventions
Who was famous for the invention of the vacuum pump in the 17th century and also pioneered the concept of the absolute vacuum of space, measured the weight of air and used air pressure to predict the weather?
1
John Cockcroft
2
Otto von Guericke
3
Enrico Fermi
4
Valerianus Magnus