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Continue to Chat#wavewatching: Standing waves on coffee on a train! https://mirjamglessmer.com/2019/10/12/wavewatching-standing-waves-on-coffee-on-a-train/
#wavewatching: Standing waves on coffee on a train! https://mirjamglessmer.com/2019/10/12/wavewatching-standing-waves-on-coffee-on-a-train/