Classical statistical mechanics requires the existence of h (but does not define its value). Eventually, following upon Planck's discovery, it was recognized that physical action cannot take on an arbitrary value. Instead, it must be some multiple of a very small quantity, the "quantum of action", now called the Planck constant. Classical physics cannot explain this fact. In many cases, such as for monochromatic light or for atoms, this quantum of action also implies that only certain energy levels are allowed, and values in between are forbidden.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What is the Planck constant formerly known as?
Ah, so.. quantum of action

During a panel discussion at Harvard University's reunion for African American alumni during the 2003–04 academic year, two prominent black professors at the institution—Lani Guinier and Henry Louis Gates—pointed out an unintended effect of affirmative action policies at Harvard. They stated that only about a third of black Harvard undergraduates were from families in which all four grandparents were born into the African American community. The majority of black students at Harvard were Caribbean and African immigrants or their children, with some others the mixed-race children of biracial couples. One Harvard student, born in the South Bronx to a black family whose ancestors have been in the United States for multiple generations, said that there were so few Harvard students from the historic African American community that they took to calling themselves "the descendants" (i.e., descendants of American slaves). The reasons for this underrepresentation of historic African Americans, and possible remedies, remain a subject of debate.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What did two prominent black professors point out at the panel discussion?
Ah, so.. an unintended effect of affirmative action policies at Harvard

The early history of Portugal is shared with the rest of the Iberian Peninsula located in South Western Europe. The name of Portugal derives from the joined Romano-Celtic name Portus Cale. The region was settled by Pre-Celts and Celts, giving origin to peoples like the Gallaeci, Lusitanians, Celtici and Cynetes, visited by Phoenicians and Carthaginians, incorporated in the Roman Republic dominions as Lusitania and part of Gallaecia, after 45 BC until 298 AD, settled again by Suebi, Buri, and Visigoths, and conquered by Moors. Other influences include some 5th-century vestiges of Alan settlement, which were found in Alenquer (old Germanic Alankerk, from Alan+kerk; meaning church of the Alan (people), Coimbra and Lisbon.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): From what name is Portugal derived?
Ah, so..
Portus Cale