Question #f1f0e

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Answer 1 · 2015-10-01T15:34:25

B

The speed of light is B regardless of Einstein's equation.

Answer 2 · 2015-10-01T15:36:12

#c=3xx10^8m/s#

In Einstein's equation:
#E=mc^2#
you need to use #c=3xx10^8m/s#
to get:
#E=1*(3xx10^8)^2=9xx10^16J# in Joules.