When were radios first fitted in cars?
In 1930, the Galvin Corporation introduced one of the first commercial car radios, the Motorola model 5T71, which sold for between $110 and $130 (2009: $1,700) and could be installed in most popular automobiles.
http://en.m.wikipedia.org/wiki/Vehicle_audio
What was the first department store in the United States?
In 1858, Rowland Hussey Macy founded Macy's as a dry goods store. Benjamin Altman and Lord & Taylor soon competed with Stewart as New York's earliest department stores, later followed by "McCreary's" and, in Brooklyn, "Abraham & Straus."
http://en.wikipedia.org/wiki/Department_store
How much water does a fire truck hold?
So I asked one of the firemen and this is what I learned: The typical truck holds 400 to 500 gallons of water, which is only enough to put out a "trash-bin fire" (or a taxi cab fire). A real structure fire requires at least one supply line from the hydrant.
http://m.mentalfloss.com/article.php?id=23781