1. By the 1920s, when amplification made television practical, Scottish inventor John Logie Baird employed the Nipkow disk in his prototype video systems. ... On March 25, 1925, Baird gave the first public demonstration of televised silhouette images in motion, at Selfridge's Department Store in London.
Answer: Most likely A or B but most likely A.
2. Answer: Most likely A or B again
3. Answer: 1. c, No single space project in this period will be "more impressive to mankind." He was speaking to the whole world with that sentence, not just the Soviets.
4 . Sputnik 1, launched the first man-made object to orbit the Earth. That launch took place on October 4, 1957 as part of the International Geophysical Year and demonstrated the viability of using artificial satellites to explore the upper atmosphere.
The surprise launch of Sputnik 1, coupled with the spectacular failure of the United States' first two Project Vanguard launch attempts, shocked the United States, which responded with a number of early satellite launches, including Explorer 1, Project SCORE, and Courier 1B. The Sputnik crisis also led to the creation of the Advanced Research Projects Agency (renamed the Defense Advanced Research Projects Agency in 1972): DARPA, and NASA, and an increase in U.S. government spending on scientific research and education.
Answer: C
(I am not sure about the rest this took me a ong time but there might be mistake i am not sure but I hope this helps.)
~Kana ^^
