As of 2007, the total installed capacity of solar hot water systems is approximately 154 thermal gigawatt (GWth). China is the world leader in their deployment with 70 GWth installed as of 2006 and a long-term goal of 210 GWth by 2020. Israel and Cyprus are the per capita leaders in the use of solar hot water systems with over 90% of homes using them. In the United States, Canada and Australia heating swimming pools is the dominant application of solar hot water with an installed capacity of 18 GWth as of 2005.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What is the capacity of a solar hot water system?
Ah, so.. approximately 154 thermal gigawatt

In 1978, she dropped out of college and relocated to New York City. She had little money and worked as a waitress at Dunkin' Donuts and with modern dance troupes, taking classes at the Alvin Ailey American Dance Theater and eventually performing with Pear Lang Dance Theater. Madonna said of her move to New York, "It was the first time I'd ever taken a plane, the first time I'd ever gotten a taxi cab. I came here with $35 in my pocket. It was the bravest thing I'd ever done." She started to work as a backup dancer for other established artists. Madonna claimed that during a late night she was returning from a rehearsal, when a pair of men held her at knifepoint and forced her to perform fellatio. Madonna later commented that "the episode was a taste of my weakness, it showed me that I still could not save myself in spite of all the strong-girl show. I could never forget it."
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What did she also work as for other established artists?
Ah, so.. backup dancer

Other historical points of interest include St. John's Church, the site of Patrick Henry's famous "Give me liberty or give me death" speech, and the Edgar Allan Poe Museum, features many of his writings and other artifacts of his life, particularly when he lived in the city as a child, a student, and a successful writer. The John Marshall House, the home of the former Chief Justice of the United States, is also located downtown and features many of his writings and objects from his life. Hollywood Cemetery is the burial grounds of two U.S. Presidents as well as many Civil War officers and soldiers.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How many United States presidents are interred in Hollywood Cemetery?
Ah, so..
two