In a hypothetical nuclear fusion reactor, the fuel is deuterium gas at a temperature of` 7 xx 10^8` K. If this gas could be used to operate a Carnot engine with `T_L = 50^@ C`, what would be the engine's efficiency? Take both temperatures to be exact and report your answer to eight significant figures.

Explanation

To find the efficiency of a Carnot engine operating between two temperatures, we can use the formula for the efficiency of a Carnot engine:

\[ \text{Efficiency} (\eta) = 1 - \frac{T_L}{T_H} \]

Where:
- \( T_H \) is the absolute temperature of the hot reservoir (in Kelvin).
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