Here is a question about this article: The waterwheel appeared in Chinese records during the Han. As mentioned by Huan Tan in about 20 AD, they were used to turn gears that lifted iron trip hammers, and were used in pounding, threshing and polishing grain. However, there is no sufficient evidence for the watermill in China until about the 5th century. The Nanyang Commandery Administrator Du Shi (d. 38 AD) created a waterwheel-powered reciprocator that worked the bellows for the smelting of iron. Waterwheels were also used to power chain pumps that lifted water to raised irrigation ditches. The chain pump was first mentioned in China by the philosopher Wang Chong in his 1st-century-AD Balanced Discourse.
What is the answer to this question: What was used to power chain pumps to raise water to irrigation ditches?
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So... Waterwheels

Here is a question about this article: The monetary base consists of coins and Federal Reserve Notes in circulation outside the Federal Reserve Banks and the U.S. Treasury, plus deposits held by depository institutions at Federal Reserve Banks. The adjusted monetary base has increased from approximately 400 billion dollars in 1994, to 800 billion in 2005, and over 3000 billion in 2013. The amount of cash in circulation is increased (or decreased) by the actions of the Federal Reserve System. Eight times a year, the 12-person Federal Open Market Committee meet to determine U.S. monetary policy. Every business day, the Federal Reserve System engages in Open market operations to carry out that monetary policy. If the Federal Reserve desires to increase the money supply, it will buy securities (such as U.S. Treasury Bonds) anonymously from banks in exchange for dollars. Conversely, it will sell securities to the banks in exchange for dollars, to take dollars out of circulation.
What is the answer to this question: How many times a year does the Federal Open Market Committee meet?
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So... Eight

Here is a question about this article: The earliest extant samples of connected (north) Estonian are the so-called Kullamaa prayers dating from 1524 and 1528. In 1525 the first book published in the Estonian language was printed. The book was a Lutheran manuscript, which never reached the reader and was destroyed immediately after publication.
What is the answer to this question: What was the first Estonian language book to be published?
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So...
a Lutheran manuscript