Problem: Energy:

For "closed systems" with no external source or sink of energy, the first law of thermodynamics states that a system's energy is constant unless energy is transferred in or out by mechanical work or heat, and that no energy is lost in transfer. This means that it is impossible to create or destroy energy. While heat can always be fully converted into work in a reversible isothermal expansion of an ideal gas, for cyclic processes of practical interest in heat engines the second law of thermodynamics states that the system doing work always loses some energy as waste heat. This creates a limit to the amount of heat energy that can do work in a cyclic process, a limit called the available energy. Mechanical and other forms of energy can be transformed in the other direction into thermal energy without such limitations. The total energy of a system can be calculated by adding up all forms of energy in the system.

How can the total energy of a system be calculated?
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A: by adding up all forms of energy in the system


Problem: In 1975, the most prominent government reforms regarding family law in a Muslim country were set in motion in the Somali Democratic Republic, which put women and men, including husbands and wives, on complete equal footing. The 1975 Somali Family Law gave men and women equal division of property between the husband and wife upon divorce and the exclusive right to control by each spouse over his or her personal property.
What law gave Somali husbands and wives equal rights over personal property?
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Answer: 1975 Somali Family Law


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
On Sentinel Peak (also known as "'A' Mountain"), just west of downtown, there is a giant "A" in honor of the University of Arizona. Starting in about 1916, a yearly tradition developed for freshmen to whitewash the "A", which was visible for miles. However, at the beginning of the Iraq War, anti-war activists painted it black. This was followed by a paint scuffle where the "A" was painted various colors until the city council intervened. It is now red, white and blue except when it is white or another color decided by a biennial election. Because of the three-color paint scheme often used, the shape of the A can be vague and indistinguishable from the rest of the peak. The top of Sentinel Peak, which is accessible by road, offers an outstanding scenic view of the city looking eastward. A parking lot located near the summit of Sentinel Peak was formerly a popular place to watch sunsets or view the city lights at night.
What year did the tradition of freshmen whitewashing the "A" begin?
A: 1916


Context and question: Karlheinz Brandenburg used a CD recording of Suzanne Vega's song "Tom's Diner" to assess and refine the MP3 compression algorithm. This song was chosen because of its nearly monophonic nature and wide spectral content, making it easier to hear imperfections in the compression format during playbacks. Some refer to Suzanne Vega as "The mother of MP3". This particular track has an interesting property in that the two channels are almost, but not completely, the same, leading to a case where Binaural Masking Level Depression causes spatial unmasking of noise artifacts unless the encoder properly recognizes the situation and applies corrections similar to those detailed in the MPEG-2 AAC psychoacoustic model. Some more critical audio excerpts (glockenspiel, triangle, accordion, etc.) were taken from the EBU V3/SQAM reference compact disc and have been used by professional sound engineers to assess the subjective quality of the MPEG Audio formats.
What word describes the nature of the song used?
Answer: monophonic


Question: Soviet Premier Nikita Khrushchev announced that a "spy-plane" had been shot down but intentionally made no reference to the pilot. As a result, the Eisenhower Administration, thinking the pilot had died in the crash, authorized the release of a cover story claiming that the plane was a "weather research aircraft" which had unintentionally strayed into Soviet airspace after the pilot had radioed "difficulties with his oxygen equipment" while flying over Turkey. The Soviets put Captain Powers on trial and displayed parts of the U-2, which had been recovered almost fully intact.
Is there an answer to this question: According to the cover story, what did the "weather research" pilot have trouble with?

Answer: oxygen equipment


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Cairo University is ranked as 401-500 according to the Academic Ranking of World Universities (Shanghai Ranking) and 551-600 according to QS World University Rankings. American University in Cairo is ranked as 360 according to QS World University Rankings and Al-Azhar University, Alexandria University and Ain Shams University fall in the 701+ range. Egypt is currently opening new research institutes for the aim of modernising research in the nation, the most recent example of which is Zewail City of Science and Technology.
According to QS World University Rankings and Al-Azhar University, Alexandria University and Ain Shams University are all ranked where?
A:
701+ range