Question: The gates of the Temple of Jerusalem used Corinthian bronze made by depletion gilding. It was most prevalent in Alexandria, where alchemy is thought to have begun. In ancient India, copper was used in the holistic medical science Ayurveda for surgical instruments and other medical equipment. Ancient Egyptians (~2400 BC) used copper for sterilizing wounds and drinking water, and later on for headaches, burns, and itching. The Baghdad Battery, with copper cylinders soldered to lead, dates back to 248 BC to AD 226 and resembles a galvanic cell, leading people to believe this was the first battery; the claim has not been verified.
Is there an answer to this question: What material were the gates of the Temple of Jerusalem made from?

Answer: Corinthian bronze


Question: The FBI is headquartered at the J. Edgar Hoover Building in Washington, D.C., with 56 field offices in major cities across the United States. The FBI also maintains over 400 resident agencies across the United States, as well as over 50 legal attachés at United States embassies and consulates. Many specialized FBI functions are located at facilities in Quantico, Virginia, as well as a "data campus" in Clarksburg, West Virginia, where 96 million sets of fingerprints "from across the United States are stored, along with others collected by American authorities from prisoners in Saudi Arabia and Yemen, Iraq and Afghanistan." The FBI is in process of moving its Records Management Division, which processes Freedom of Information Act (FOIA) requests, to Winchester, Virginia.
Is there an answer to this question: How many field offices in major cities does the CIA have?

Answer: unanswerable


Question: DC systems (especially third-rail systems) are limited to relatively low voltages and this can limit the size and speed of trains and cannot use low-level platform and also limit the amount of air-conditioning that the trains can provide. This may be a factor favouring overhead wires and high-voltage AC, even for urban usage. In practice, the top speed of trains on third-rail systems is limited to 100 mph (160 km/h) because above that speed reliable contact between the shoe and the rail cannot be maintained.
Is there an answer to this question: What is the speed limit for third rail system trains?

Answer: 160 km/h


Question: Chinese characters are logograms used in the writing of Chinese and some other Asian languages. In Standard Chinese they are called Hanzi (simplified Chinese: 汉字; traditional Chinese: 漢字). They have been adapted to write a number of other languages including: Japanese, where they are known as kanji, Korean, where they are known as hanja, and Vietnamese in a system known as chữ Nôm. Collectively, they are known as CJKV characters. In English, they are sometimes called Han characters. Chinese characters constitute the oldest continuously used system of writing in the world. By virtue of their widespread current use in East Asia, and historic use throughout the Sinosphere, Chinese characters are among the most widely adopted writing systems in the world.
Is there an answer to this question: What are Chinese characters called in standard Chinese?

Answer:
Hanzi