Which Riga-born engineer, a pioneer of rocket science, developed ideas for spaceflight in the 1920s?
Answer and explanation
Correct answer: C. Friedrich Zander
- Step 1: Zander wrote on rocket engines and interplanetary flight. Step 2. He worked in the Soviet Union and died in 1933. Answer: Friedrich Zander. Why not the others: Ostwald and Walden were chemists, and Zapp was a camera inventor.
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