In a nuclear reactor `U^(235)` undergoes fission releasing energy 100 MeV , the reactor has 20% efficiency and the power produces is 2000 MW . If the reactor is to function for 5 yr , find the total mass of uranium required .

Explanation

To solve the problem of finding the total mass of uranium-235 required for a nuclear reactor to function for 5 years at a power output of 2000 MW with an efficiency of 20%, we can follow these steps:

### Step 1: Calculate the Power Input
Given that the power output is 2000 MW and the efficiency of the reactor is 20%, we can find the power input using the formula:

\[ \text{Power Input} = \frac{\text{Power Output}}{\text{Efficiency}} \]
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