The United States Association for Young Physicists Tournaments (USAYPT) held its annual U.S. Invitational Young Physicists Tournament Feb. 4–5, 2011, at Oak Ridge Associated Universities Institute for Science Education, Oak Ridge, TN. Young physicists tournaments are theoretical and experimental research-based team competitions described more fully at the USAYPT website: www.usaypt.org. This year the problems were #1: Domino Wave, #2: Salt-Water Oscillator, #3: Magic Motor, and #4: Boiling Water.

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