Question: High-altitude clouds on Neptune have been observed casting shadows on the opaque cloud deck below. There are also high-altitude cloud bands that wrap around the planet at constant latitude. These circumferential bands have widths of 50–150 km and lie about 50–110 km above the cloud deck. These altitudes are in the layer where weather occurs, the troposphere. Weather does not occur in the higher stratosphere or thermosphere. Unlike Uranus, Neptune's composition has a higher volume of ocean, whereas Uranus has a smaller mantle.
Try to answer this question if possible: What are the widths of the cloud bands on Neptune? 
Answer: 50–150 km
Question: Tito's greatest strength, in the eyes of the western communists, had been in suppressing nationalist insurrections and maintaining unity throughout the country. It was Tito's call for unity, and related methods, that held together the people of Yugoslavia. This ability was put to a test several times during his reign, notably during the Croatian Spring (also referred as the Masovni pokret, maspok, meaning "Mass Movement") when the government suppressed both public demonstrations and dissenting opinions within the Communist Party. Despite this suppression, much of maspok's demands were later realized with the new constitution, heavily backed by Tito himself against opposition from the Serbian branch of the party.[citation needed] On 16 May 1974, the new Constitution was passed, and the aging Tito was named president for life, a status which he would enjoy for five years.
Try to answer this question if possible: Who was named President for Life of Yugoslavia in 1974?
Answer: Tito
Question: A major turning point in the development of DC machines took place in 1864, when Antonio Pacinotti described for the first time the ring armature with its symmetrically grouped coils closed upon themselves and connected to the bars of a commutator, the brushes of which delivered practically non-fluctuating current. The first commercially successful DC motors followed the invention by Zénobe Gramme who, in 1871, reinvented Pacinotti's design. In 1873, Gramme showed that his dynamo could be used as a motor, which he demonstrated to great effect at exhibitions in Vienna and Philadelphia by connecting two such DC motors at a distance of up to 2 km away from each other, one as a generator. (See also 1873 : l'expérience décisive [Decisive Workaround] .)
Try to answer this question if possible: How far from each other were the motors in Gramme's demonstrations?
Answer: 2 km
Question: Roads in the US have been paved with materials that include asphalt/bitumen since at least 1870, when a street in front of the Newark, NJ City Hall was paved. In many cases, these early pavings were made from naturally occurring "bituminous rock", such as at Ritchie Mines in Macfarlan in Ritchie County, West Virginia from 1852 to 1873. In 1876, asphalt-based paving was used to pave Pennsylvania Avenue in Washington, DC, in time for the celebration of the national centennial. Asphalt/bitumen was also used for flooring, paving and waterproofing of baths and swimming pools during the early 20th century, following similar trends in Europe.
Try to answer this question if possible: What natural substance was used in early road pavings?
Answer:
bituminous rock