Question

Find the mass required to generate 1.3 × 10^15 J of energy

Answer 1

$use \: e = m {c}^{2}$
e is 1.3×10^15 J. c=3×10^8 So c^2=9×10^16.
=>1.3×10^15=m×9×10^16
=> 1.3×10^15/9×10^16=m
=>13/900=m
=>1.444×10^-2 kg OR 14.44 gms is mass required to generate 1.3×10^15J of energy.