[Q]: Sentence: Matter may be converted to energy (and vice versa), but mass cannot ever be destroyed; rather, mass/energy equivalence remains a constant for both the matter and the energy, during any process when they are converted into each other. Question: Why is a loss of energy difficult to measure by weight?
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[A]: no

[Q]: Sentence: "Ballin' the Jack", which was a popular dance in the years before "The Charleston", was written by native Charlestonian Chris Smith. Question: Who created the song "Charleston Rag"?
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[A]: no

[Q]: Sentence: In August 2006 the world record for the most amount of simultaneous fireworks was surpassed, by Roy Lowry of the University of Plymouth, over Plymouth Sound. Question: What institution did Roy Lowry work for?
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[A]:
yes