1) What does a tachometer measure?
2) On this date in 1964, this woman was the first to successfully circumnavigate the earth flying solo.
3) What year did the Berlin Wall get torn down?
4) What is the name of the new strain of bird flu from China?
Answers:
1) rotation speed
2) Geraldine "Jerrie" Mock. The flight took 291 days, 21 stopovers and covered about 50, 300 km. Born in nearby Newark, Ohio in 1925, she called her aircraft the Spirit of Columbus.
3) 1989
4) H7N9
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