QUES: Likewise, group theory helps predict the changes in physical properties that occur when a material undergoes a phase transition, for example, from a cubic to a tetrahedral crystalline form. An example is ferroelectric materials, where the change from a paraelectric to a ferroelectric state occurs at the Curie temperature and is related to a change from the high-symmetry paraelectric state to the lower symmetry ferroelectic state, accompanied by a so-called soft phonon mode, a vibrational lattice mode that goes to zero frequency at the transition.

Which stage can physical properties be used to make predictions about group theory?
What is the answer?
ANS: unanswerable
QUES: In the West, the ancient Greeks initially regarded the best form of government as rule by the best men. Plato advocated a benevolent monarchy ruled by an idealized philosopher king, who was above the law. Plato nevertheless hoped that the best men would be good at respecting established laws, explaining that "Where the law is subject to some other authority and has none of its own, the collapse of the state, in my view, is not far off; but if law is the master of the government and the government is its slave, then the situation is full of promise and men enjoy all the blessings that the gods shower on a state." More than Plato attempted to do, Aristotle flatly opposed letting the highest officials wield power beyond guarding and serving the laws. In other words, Aristotle advocated the rule of law:

Who did Plato hope would be subject to the established laws?
What is the answer?
ANS: unanswerable
QUES: The European Central Bank (ECB) is the central bank for the euro and administers monetary policy of the Eurozone, which consists of 19 EU member states and is one of the largest currency areas in the world. It is one of the world's most important central banks and is one of the seven institutions of the European Union (EU) listed in the Treaty on European Union (TEU). The capital stock of the bank is owned by the central banks of all 28 EU member states.[dated info] The Treaty of Amsterdam established the bank in 1998, and it is headquartered in Frankfurt, Germany. As of 2015[update] the President of the ECB is Mario Draghi, former governor of the Bank of Italy, former member of the World Bank, and former managing director of the Goldman Sachs international division (2002–2005). The bank primarily occupied the Eurotower prior to, and during, the construction of the new headquarters.

What is the Eurozone?
What is the answer?
ANS:
consists of 19 EU member states and is one of the largest currency areas in the world