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3.7 x10 to the power of -14 Joules= M(mass) x 3.0 x 10 to the power of 8 per meter. Find the mass
According to Einstein’s equation, what mass is equivalent to an energy of
3.7 × 10to the power of –14 J?
You should use a value for c of 3.0 × 10 to the power of 8 m s–1 and give your answer in kilograms, in scientific notation and to two significant figures.
 Dec 9, 2013

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trueskawa:

3.7 x10 to the power of -14 Joules= M(mass) x 3.0 x 10 to the power of 8 per meter. Find the mass
According to Einstein’s equation, what mass is equivalent to an energy of
3.7 × 10to the power of –14 J?
You should use a value for c of 3.0 × 10 to the power of 8 m s–1 and give your answer in kilograms, in scientific notation and to two significant figures.



I think that you forgot that c is squared.
e=mc 2

3.7 * 10 -14 = M * (3 * 10 8) 2

3.7 * 10 -14 = M * (9 * 10 16)

(3.7/9) * (10 -14 / 10 16) = M

0.411111 * 10 -30 = M

M = 4.11111 * 10 -31

M = 4.1 * 10 -31 Kg (to 2 significant figures)
 Dec 10, 2013

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