ST1.2 Precision 1

The amount of energy required to create an electron and a positron is
E=2mec2
where me=9.11×10-31 kg is the electron mass, and c=2.9979×108 ms-1 is the speed of light. Given this data, the value of E (in units of 10-13 J) should be quoted as:
Incorrect
Incorrect
Incorrect
Correct

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