Answer
The sample of water at $65^{\circ}C$.
Work Step by Step
$65^{\circ}F=[(65-32) \frac{5}{9}]^{\circ}C=18^{\circ}C$
$65^{\circ}F$ is less than $65^{\circ}C$.
Therefore, the sample of water at $65^{\circ}C$ has the higher temperature.
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