Question: Bitumen was used in early photographic technology. In 1826 or 1827, it was used by French scientist Joseph Nicephore Niepce to make the oldest surviving photograph from nature. The bitumen was thinly coated onto a pewter plate which was then exposed in a camera. Exposure to light hardened the bitumen and made it insoluble, so that when it was subsequently rinsed with a solvent only the sufficiently light-struck areas remained. Many hours of exposure in the camera were required, making bitumen impractical for ordinary photography, but from the 1850s to the 1920s it was in common use as a photoresist in the production of printing plates for various photomechanical printing processes.[not in citation given]
Is there an answer to this question: Exposure to what natural element was necessary for early photographic plates?

Answer: light

Question: The state is among the best in pre-kindergarten education, and the National Institute for Early Education Research rated it first in the United States with regard to standards, quality, and access to pre-kindergarten education in 2004, calling it a model for early childhood schooling. High school dropout rate decreased from 3.1 to 2.5 percent between 2007 and 2008 with Oklahoma ranked among 18 other states with 3 percent or less dropout rate. In 2004, the state ranked 36th in the nation for the relative number of adults with high school diplomas, though at 85.2 percent, it had the highest rate among southern states.
Is there an answer to this question: Who said Oklahoma's pre-K program is the best in the US?

Answer: National Institute for Early Education Research

Question: In 1995 the National Lottery granted money for a 4.6m sports complex, to add to Eton's existing facilities of two swimming pools, 30 cricket squares, 24 football, rugby and hockey pitches and a gym. The College paid 200,000 and contributed 4.5 hectares of land in return for exclusive use of the facilities during the daytime only. The UK Sports Council defended the deal on the grounds that the whole community would benefit, while the bursar claimed that Windsor, Slough and Eton Athletic Club was "deprived" because local people (who were not pupils at the College) did not have a world-class running track and facilities to train with. Steve Osborn, director of the Safe Neighbourhoods Unit, described the decision as "staggering" given the background of a substantial reduction in youth services by councils across the country, a matter over which, however, neither the College nor the UK Sports Council, had any control. The facility, which became the Thames Valley Athletics Centre, opened in April 1999.
Is there an answer to this question: Who granted money to Eton for a sports complex in 1995?

Answer: the National Lottery

Question: The reinforcement type defines two major classes of materials - woven and non-woven. Woven reinforcements are cheaper, but the high dielectric constant of glass may not be favorable for many higher-frequency applications. The spatially nonhomogeneous structure also introduces local variations in electrical parameters, due to different resin/glass ratio at different areas of the weave pattern. Nonwoven reinforcements, or materials with low or no reinforcement, are more expensive but more suitable for some RF/analog applications.
Is there an answer to this question: Materials with low or no refinement are called what?

Answer:
unanswerable