Answer:
The number of fission are equal to 1.947 x 10¹⁶
Explanation:
Energy of one fission=208*1.6*10⁻¹³ Joule.
Power of the bulb=120 Watts.
Time t in seconds = 1.5h=5400 seconds
Total energy E=Power* time=120*5400=64.8 x 10⁴ Joule.
Number of fissions N= total energy / energy for one fission
=(64.8 x 10⁴)/(208x1.6x10⁻¹³)
=1.947 x 10¹⁶
