Problem: The mantle is equivalent to 10 to 15 Earth masses and is rich in water, ammonia and methane. As is customary in planetary science, this mixture is referred to as icy even though it is a hot, dense fluid. This fluid, which has a high electrical conductivity, is sometimes called a waterammonia ocean. The mantle may consist of a layer of ionic water in which the water molecules break down into a soup of hydrogen and oxygen ions, and deeper down superionic water in which the oxygen crystallises but the hydrogen ions float around freely within the oxygen lattice. At a depth of 7000 km, the conditions may be such that methane decomposes into diamond crystals that rain downwards like hailstones. Very-high-pressure experiments at the Lawrence Livermore National Laboratory suggest that the base of the mantle may comprise an ocean of liquid carbon with floating solid 'diamonds'.
How deep does Neptune's oxygen ocean go?
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Answer: unanswerable

Problem: Railway Himachal is famous for its narrow gauge tracks railways, one is UNESCO World Heritage Kalka-Shimla Railway and another one is PathankotJogindernagar. Total length of these two tracks is 259 kilometres (161 mi). Kalka-Shimla Railway track passes through many tunnels, while PathankotJogindernagar gently meanders through a maze of hills and valleys. It also has standard gauge railway track which connect Amb (Una district) to Delhi. A survey is being conducted to extend this railway line to Kangra (via Nadaun). Other proposed railways in the state are Baddi-Bilaspur, Dharamsala-Palampur and Bilaspur-Manali-Leh.
What are the 2 narrow gauge railways in the Railway Himachal?
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Answer: UNESCO World Heritage Kalka-Shimla Railway and another one is PathankotJogindernagar

Problem: The Spanish language is the second most spoken language in the United States. There are 45 million Hispanophones who speak Spanish as a first or second language in the United States, as well as six million Spanish language students. Together, this makes the United States of America the second largest Hispanophone country in the world after Mexico, and with the United States having more Spanish-speakers than Colombia and Spain (but fewer first language speakers). Spanish is the Romance language and the Indo-European language with the largest number of native speakers in the world. Roughly half of all American Spanish-speakers also speak English "very well," based on their self-assessment in the U.S. Census.
How many Hispanics speak English too?
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Answer:
Roughly half of all American Spanish-speakers also speak English "very well," based on their self-assessment in the U.S. Census.