AQA physics AS past paper question ?? HELP Watch

BonBon1
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http://filestore.aqa.org.uk/sample-p...1-QP-JUN16.PDF
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In the paper question 6.3 the annihilation question, i don't understand why you would times the rest mass by 2, as annihilation is , energy = rest mass , however in the mark scheme they said that energy =2 rest mass. Mark scheme below.
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http://filestore.aqa.org.uk/sample-p...W-MS-JUN16.PDF
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TSR Jessica
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Sorry you've not had any responses about this. Are you sure you've posted in the right place? Here's a link to our subject forum which should help get you more responses if you post there.
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