Question: The light from LEDs can be modulated very quickly so they are used extensively in optical fiber and free space optics communications. This includes remote controls, such as for TVs, VCRs, and LED Computers, where infrared LEDs are often used. Opto-isolators use an LED combined with a photodiode or phototransistor to provide a signal path with electrical isolation between two circuits. This is especially useful in medical equipment where the signals from a low-voltage sensor circuit (usually battery-powered) in contact with a living organism must be electrically isolated from any possible electrical failure in a recording or monitoring device operating at potentially dangerous voltages. An optoisolator also allows information to be transferred between circuits not sharing a common ground potential.
Is there an answer to this question: Where are opto-isolators found?

Answer: medical equipment

Question: In 1822, the citizens of Boston voted to change the official name from "the Town of Boston" to "the City of Boston", and on March 4, 1822, the people of Boston accepted the charter incorporating the City. At the time Boston was chartered as a city, the population was about 46,226, while the area of the city was only 4.7 square miles (12 km2).
Is there an answer to this question: What year was the name changes to the City of Boston?

Answer: 1822

Question: Liber Aboali Abincine de Anima in arte Alchemiae was the most influential, having influenced later medieval chemists and alchemists such as Vincent of Beauvais. However Anawati argues (following Ruska) that the de Anima is a fake by a Spanish author. Similarly the Declaratio is believed not to be actually by Avicenna. The third work (The Book of Minerals) is agreed to be Avicenna's writing, adapted from the Kitab al-Shifa (Book of the Remedy). Ibn Sina classified minerals into stones, fusible substances, sulfurs, and salts, building on the ideas of Aristotle and Jabir. The epistola de Re recta is somewhat less sceptical of alchemy; Anawati argues that it is by Avicenna, but written earlier in his career when he had not yet firmly decided that transmutation was impossible.
Is there an answer to this question: What work by Avicenna is thought to be a fake?

Answer: Liber Aboali Abincine de Anima in arte Alchemiae

Question: Comcast delivers third-party television programming content to its own customers, and also produces its own first-party content both for subscribers and customers of other competing television services. Fully or partially owned Comcast programming includes Comcast Newsmakers, Comcast Network, Comcast SportsNet, SportsNet New York, MLB Network, Comcast Sports Southeast/Charter Sports Southeast, NBC Sports Network, The Golf Channel, AZN Television, and FEARnet. On May 19, 2009, Disney and ESPN announced an agreement to allow Comcast Corporation to carry the channels ESPNU and ESPN3. The U.S. Olympic Committee and Comcast intended to team up to create The U.S. Olympic Network, which was slated to launch after the 2010 Vancouver Olympic Games. These plans were then put on hold by the U.S. Olympic Committee. The U.S. Olympic Committee and Comcast have ended the plans to create The U.S. Olympic Network.
Is there an answer to this question: When did the Olympic Committee and Comcast officially launch their combined network?

Answer:
unanswerable