A lamp is left on for $2.0$ hours. Its power input is $1.0\,\text{W}$. The energy released by the lamp as light is $7.0 \times 10^3\,\text{J}$. How much energy is changed into other forms by the lamp?
- A$120\,\text{J}$
- B$200\,\text{J}$
- C$3400\,\text{J}$
- D$7200\,\text{J}$