8 inventions of Ukrainians that are used all over the world

What was the name of the submarine?

What Ukrainian scientist became the founder of the electrified system?

What is the Sich in this sentence:Modern signaling is significantly different from the system that was introduced back in the days of ...................., but it was Ukrainian development that became the basis for the further development of this industry.

In honor of whom they named "X-ray machine"?

What modern Ukrainian engineer created a device that turned wood waste into environmentally friendly fuel?

Who is called the founder of astronautics today?

In what year did Igor Sikorsky invent and vent the world's first helicopter?

Thanks to the research of Leonard Smirnov, a professor ....... of which state academy?