Question: Meanwhile, he had written to Abu Ya'far, the prefect of the dynamic city of Isfahan, offering his services. The new emir of Hamadan, hearing of this correspondence and discovering where Ibn Sina was hiding, incarcerated him in a fortress. War meanwhile continued between the rulers of Isfahan and Hamadan; in 1024 the former captured Hamadan and its towns, expelling the Tajik mercenaries. When the storm had passed, Ibn Sina returned with the emir to Hamadan, and carried on his literary labors. Later, however, accompanied by his brother, a favorite pupil, and two slaves, Ibn Sina escaped from the city in the dress of a Sufi ascetic. After a perilous journey, they reached Isfahan, receiving an honorable welcome from the prince.
Is there an answer to this question: What did Abu Ya'far do when he found out where Ibn Sani was hiding?

Answer: unanswerable

Question: To varying degrees, Nasser's statist system of government was continued in Egypt and emulated by virtually all Arab republics, namely Algeria, Syria, Iraq, Tunisia, Yemen, Sudan, and Libya. Ahmed Ben Bella, Algeria's first president, was a staunch Nasserist. Abdullah al-Sallal drove out the king of North Yemen in the name of Nasser's pan-Arabism. Other coups influenced by Nasser included those that occurred in Iraq in July 1958 and Syria in 1963. Muammar Gaddafi, who overthrew the Libyan monarchy in 1969, considered Nasser his hero and sought to succeed him as "leader of the Arabs". Also in 1969, Colonel Gaafar Nimeiry, a supporter of Nasser, took power in Sudan. The Arab Nationalist Movement (ANM) helped spread Nasser's pan-Arabist ideas throughout the Arab world, particularly among the Palestinians, Syrians, and Lebanese, and in South Yemen, the Persian Gulf, and Iraq. While many regional heads of state tried to emulate Nasser, Podeh opined that the "parochialism" of successive Arab leaders "transformed imitation [of Nasser] into parody".
Is there an answer to this question: Who was Algeria's first president, a fervent Nasserist?

Answer: Ben Bella

Question: The Jordan River runs along the Jordan Rift Valley, from Mount Hermon through the Hulah Valley and the Sea of Galilee to the Dead Sea, the lowest point on the surface of the Earth. Further south is the Arabah, ending with the Gulf of Eilat, part of the Red Sea. Unique to Israel and the Sinai Peninsula are makhteshim, or erosion cirques. The largest makhtesh in the world is Ramon Crater in the Negev, which measures 40 by 8 kilometers (25 by 5 mi). A report on the environmental status of the Mediterranean basin states that Israel has the largest number of plant species per square meter of all the countries in the basin.
Is there an answer to this question: What is the largest makhtesh in the world?

Answer: Ramon Crater

Question: The photoelectric effect is the emission of electrons (called "photoelectrons") from a surface when light is shone on it. It was first observed by Alexandre Edmond Becquerel in 1839, although credit is usually reserved for Heinrich Hertz, who published the first thorough investigation in 1887. Another particularly thorough investigation was published by Philipp Lenard in 1902. Einstein's 1905 paper discussing the effect in terms of light quanta would earn him the Nobel Prize in 1921, when his predictions had been confirmed by the experimental work of Robert Andrews Millikan. The Nobel committee awarded the prize for his work on the photo-electric effect, rather than relativity, both because of a bias against purely theoretical physics not grounded in discovery or experiment, and dissent amongst its members as to the actual proof that relativity was real.
Is there an answer to this question: What did Einstein with the 1921 Nobel Prize for?

Answer:
his work on the photo-electric effect