Help Please !!
I'm doing a practice test for my physics assessment tomorrow and i cant figure out this question even with the answers.
The energy released during the reaction is 2.724x10^11 J. A nuclear power plant has an output of 8.21 GW (8.21x10^9 W). Calculate the minimum mass of uranium 235 that would be used every hour. (The mass of an atom of uranium 235 is 390.3x10^27 kg)
The answer is
To produce 8.21x10^9 J of energy, 8.21x10^9/ 2.724x10^9 = 3.0140x10^20 reactions must occur. Each reaction involves 1 atom of uranium, so in one second :
m= 3.0140 x 10^20 x 390.3 x 10^27
= 1.1764 x 10^4kg
In 1 hour, m= 1.1764 x10^4 x 60 x 60 = 0.423kg
Can someone please just walk me through how they got these figures in these places and what formulas were actually used. Thanks.
