Consider a Student Whose Mass Is $70 \mathrm {~kg}$ If All His Mass Were Converted to Electrical Energy

Short Answer

Consider a student whose mass is $70 \mathrm {~kg}$ . If all his mass were converted to electrical energy, for how many years could he keep a $100 - \mathrm { W }$ light bulb burning? $\left( c = 3.0 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } \right)$