If the Mass of A $1.0 - \mathrm { kg }$

Short Answer

If the mass of a $1.0 - \mathrm { kg }$ book could be entirely converted into electrical energy, how many $\mathrm { kW } \cdot \mathrm { h }$ of energy would that generate? $\left( c = 3.0 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } \right)$