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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.

What temperature causes the change of ferroelectric materials?
Answer: Curie temperature
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New Haven was home to one of the important early events in the burgeoning anti-slavery movement when, in 1839, the trial of mutineering Mende tribesmen being transported as slaves on the Spanish slaveship Amistad was held in New Haven's United States District Court. There is a statue of Joseph Cinque, the informal leader of the slaves, beside City Hall. See "Museums" below for more information. Abraham Lincoln delivered a speech on slavery in New Haven in 1860, shortly before he secured the Republican nomination for President.

What was the name of the Spanish slave ship used to transport the Mende tribesmen?
Answer: Amistad
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In the early years of coverage the BBC had exclusive radio coverage with a picture of the pitch marked in the Radio Times with numbered squares to help the listener follow the match on the radio. The first FA Cup Final on Radio was in 1926 between Bolton Wanderers and Manchester City but this was only broadcast in Manchester, the first national final on BBC Radio was between Arsenal and Cardiff in 1927. The first final on BBC Television was in 1937 in a match which featured Sunderland and Preston North End but this was not televised in full. The following season's final between Preston and Huddersfield was covered in full by the BBC. When ITV was formed in 1955 they shared final coverage with the BBC in one of the only club matches shown live on television, during the 1970s and 1980s coverage became more elaborate with BBC and ITV trying to steal viewers from the others by starting coverage earlier and earlier some starting as early as 9 a.m. which was six hours before kick off. Nowadays, this continues with Setanta and ESPN having all-day broadcasts from Wembley, but terrestrial TV coverage usually begins two hours before kick off. The sharing of rights between BBC and ITV continued from 1955 to 1988, when ITV lost coverage to the new Sports Channel which later became Sky Sports.

What was the first Fa cup radio broadcast?
Answer:
The first FA Cup Final on Radio was in 1926