Which three-letter unit measures "a real piece of" work?

A real 19th-century white whale called Mocha Dick may have inspired which 1851 novel? The Chernaya River in Crimea runs just east of which city that was besieged in 1854 and 1855? A real Edinburgh prison nicknamed "the Heart of Midlothian" is featured in which author's 1818 novel of the same name? A real mutiny aboard a Soviet frigate inspired which 1984 Tom Clancy bestseller? Which dome-shaped snow house is a "really cool" dwelling for an Inuit hunter? Which 2006 film is about a team of sled dogs left stranded in Antarctica? Which Republican House majority leader of 2003 to 2005 was nicknamed "the Hammer"? What do you make by combining 1 part milk with 1 part cream?