QUES: Time appears to have a directionthe past lies behind, fixed and immutable, while the future lies ahead and is not necessarily fixed. Yet for the most part the laws of physics do not specify an arrow of time, and allow any process to proceed both forward and in reverse. This is generally a consequence of time being modeled by a parameter in the system being analyzed, where there is no "proper time": the direction of the arrow of time is sometimes arbitrary. Examples of this include the Second law of thermodynamics, which states that entropy must increase over time (see Entropy); the cosmological arrow of time, which points away from the Big Bang, CPT symmetry, and the radiative arrow of time, caused by light only traveling forwards in time (see light cone). In particle physics, the violation of CP symmetry implies that there should be a small counterbalancing time asymmetry to preserve CPT symmetry as stated above. The standard description of measurement in quantum mechanics is also time asymmetric (see Measurement in quantum mechanics).
What needs to be preserved according to quantum mechanics?

ANS: unanswerable

QUES: Traditional morphology-based or appearance-based systematics have usually given the Hexapoda the rank of superclass,:180 and identified four groups within it: insects (Ectognatha), springtails (Collembola), Protura, and Diplura, the latter three being grouped together as the Entognatha on the basis of internalized mouth parts. Supraordinal relationships have undergone numerous changes with the advent of methods based on evolutionary history and genetic data. A recent theory is that the Hexapoda are polyphyletic (where the last common ancestor was not a member of the group), with the entognath classes having separate evolutionary histories from the Insecta. Many of the traditional appearance-based taxa have been shown to be paraphyletic, so rather than using ranks like subclass, superorder, and infraorder, it has proved better to use monophyletic groupings (in which the last common ancestor is a member of the group). The following represents the best-supported monophyletic groupings for the Insecta.
How many groups are defined in the superclass?

ANS: four groups

QUES: Testimony given to the Financial Crisis Inquiry Commission by Richard M. Bowen III on events during his tenure as the Business Chief Underwriter for Correspondent Lending in the Consumer Lending Group for Citigroup (where he was responsible for over 220 professional underwriters) suggests that by the final years of the U.S. housing bubble (20062007), the collapse of mortgage underwriting standards was endemic. His testimony stated that by 2006, 60% of mortgages purchased by Citi from some 1,600 mortgage companies were "defective" (were not underwritten to policy, or did not contain all policy-required documents) this, despite the fact that each of these 1,600 originators was contractually responsible (certified via representations and warrantees) that its mortgage originations met Citi's standards. Moreover, during 2007, "defective mortgages (from mortgage originators contractually bound to perform underwriting to Citi's standards) increased... to over 80% of production".
How many underwriters was Richard M. Bowen III responsible for at Citigroup?

ANS: 220

QUES: In Paris, Chopin encountered artists and other distinguished figures, and found many opportunities to exercise his talents and achieve celebrity. During his years in Paris he was to become acquainted with, among many others, Hector Berlioz, Franz Liszt, Ferdinand Hiller, Heinrich Heine, Eugene Delacroix, and Alfred de Vigny. Chopin was also acquainted with the poet Adam Mickiewicz, principal of the Polish Literary Society, some of whose verses he set as songs.
What was the name of the poet Chopin became acquainted with in Paris?

ANS:
Adam Mickiewicz