Problem: Measurement of light or photometry is generally concerned with the amount of useful light falling on a surface and the amount of light emerging from a lamp or other source, along with the colors that can be rendered by this light. The human eye responds differently to light from different parts of the visible spectrum, therefore photometric measurements must take the luminosity function into account when measuring the amount of useful light. The basic SI unit of measurement is the candela (cd), which describes the luminous intensity, all other photometric units are derived from the candela. Luminance for instance is a measure of the density of luminous intensity in a given direction. It describes the amount of light that passes through or is emitted from a particular area, and falls within a given solid angle. The SI unit for luminance is candela per square metre (cd/m2). The CGS unit of luminance is the stilb, which is equal to one candela per square centimetre or 10 kcd/m2. The amount of useful light emitted from a source or the luminous flux is measured in lumen (lm).
What is the amount of useful light emitted from a luminous flux measured in?
The answer is the following: lumen (lm)

Problem: A HDI of 0.8 or more is considered to represent "high development". This includes all developed countries, such as those in North America, Western Europe, Oceania, and Eastern Asia, as well as some developing countries in Eastern Europe, Central and South America, Southeast Asia, the Caribbean, and the oil-rich Arabian Peninsula. Seven countries were promoted to this category this year, leaving the "medium development" group: Albania, Belarus, Brazil, Libya, Macedonia, Russia and Saudi Arabia.
Which South American country was included among the seven promoted countries?
The answer is the following: Brazil

Problem: Some Flemish dialects are so distinct that they might be considered as separate language variants, although the strong significance of language in Belgian politics would prevent the government from classifying them as such. West Flemish in particular has sometimes been considered a distinct variety. Dialect borders of these dialects do not correspond to present political boundaries, but reflect older, medieval divisions. The Brabantian dialect group, for instance, also extends to much of the south of the Netherlands, and so does Limburgish. West Flemish is also spoken in Zeelandic Flanders (part of the Dutch province of Zeeland), and by older people in French Flanders (a small area that borders Belgium).
What area that abuts Belgium still has some older people who speak West Flemish?
The answer is the following: French Flanders

Problem: About 69% of the population is of Dutch ancestry. Approximately 10% of the population consists of immigrants from Western countries, while 21% of the population is of non-Western origin (9% Moroccan, 5% Turkish, 3% Surinamese and Dutch Caribbean and 5% of other countries). Some of the city's boroughs have a relatively high percentage of originally non-Dutch inhabitants i.e. Kanaleneiland 83% and Overvecht 57%. Like Rotterdam, Amsterdam, The Hague and other large Dutch cities, Utrecht faces some socio-economic problems. About 38% percent of its population either earns a minimum income or is dependent on social welfare (17% of all households). Boroughs such as Kanaleneiland, Overvecht and Hoograven consist primarily of high-rise housing developments, and are known for relatively high poverty and crime rate.
What Socio economic problems does Utrecht face
The answer is the following:
About 38% percent of its population either earns a minimum income or is dependent on social welfare