Question: Simultaneous videoconferencing among three or more remote points is possible by means of a Multipoint Control Unit (MCU). This is a bridge that interconnects calls from several sources (in a similar way to the audio conference call). All parties call the MCU, or the MCU can also call the parties which are going to participate, in sequence. There are MCU bridges for IP and ISDN-based videoconferencing. There are MCUs which are pure software, and others which are a combination of hardware and software. An MCU is characterised according to the number of simultaneous calls it can handle, its ability to conduct transposing of data rates and protocols, and features such as Continuous Presence, in which multiple parties can be seen on-screen at once. MCUs can be stand-alone hardware devices, or they can be embedded into dedicated videoconferencing units.
Is there an answer to this question: In what way can an MCU be characterized?

Answer: the number of simultaneous calls it can handle


Question: Child labour has been a consistent struggle for children in Brazil ever since the country was colonized on April 22, 1550 by Pedro Álvares Cabral. Work that many children took part in was not always visible, legal, or paid. Free or slave labour was a common occurrence for many youths and was a part of their everyday lives as they grew into adulthood. Yet due to there being no clear definition of how to classify what a child or youth is, there has been little historical documentation of child labour during the colonial period. Due to this lack of documentation, it is hard to determine just how many children were used for what kinds of work before the nineteenth century. The first documentation of child labour in Brazil occurred during the time of indigenous societies and slave labour where it was found that children were forcibly working on tasks that exceeded their emotional and physical limits. Armando Dias, for example, died in November 1913 whilst still very young, a victim of an electric shock when entering the textile industry where he worked. Boys and girls were victims of industrial accidents on a daily basis.
Is there an answer to this question: When was Brazil colonized?

Answer: April 22, 1550


Question: In philosophy, idealism is the group of philosophies which assert that reality, or reality as we can know it, is fundamentally mental, mentally constructed, or otherwise immaterial. Epistemologically, idealism manifests as a skepticism about the possibility of knowing any mind-independent thing. In a sociological sense, idealism emphasizes how human ideas—especially beliefs and values—shape society. As an ontological doctrine, idealism goes further, asserting that all entities are composed of mind or spirit. Idealism thus rejects physicalist and dualist theories that fail to ascribe priority to the mind.
Is there an answer to this question: What processes do idealists say are constructed by reality?

Answer: unanswerable


Question: At the time of the fall of the Egyptian monarchy in the early 1950s, less than half a million Egyptians were considered upper class and rich, four million middle class and 17 million lower class and poor. Fewer than half of all primary-school-age children attended school, most of them being boys. Nasser's policies changed this. Land reform and distribution, the dramatic growth in university education, and government support to national industries greatly improved social mobility and flattened the social curve. From academic year 1953-54 through 1965-66, overall public school enrolments more than doubled. Millions of previously poor Egyptians, through education and jobs in the public sector, joined the middle class. Doctors, engineers, teachers, lawyers, journalists, constituted the bulk of the swelling middle class in Egypt under Nasser. During the 1960s, the Egyptian economy went from sluggish to the verge of collapse, the society became less free, and Nasser's appeal waned considerably.
Is there an answer to this question: What professions made up the buld on middle class under Nasser?

Answer:
Doctors, engineers, teachers, lawyers, journalists