Answer
(a) $E = 1.8\times 10^{16}~J$
(b) The energy equivalent exceeds the food energy by a factor of $9.0\times 10^9$
Work Step by Step
(a) We can find the energy equivalent of the mass:
$E = mc^2$
$E = (0.20~kg)(3.0\times 10^8~m/s)^2$
$E = 1.8\times 10^{16}~J$
(b) $\frac{1.8\times 10^{16}~J}{2\times 10^6~J} = 9.0\times 10^9$
The energy equivalent exceeds the food energy by a factor of $9.0\times 10^9$
