To convert a temperature from Kelvin (K) to degrees Fahrenheit (°F), you can use the following formula:
\[ °F = \left( K - 273.15 \right) \times \frac{9}{5} + 32 \]
Let's convert 77 K to °F:
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Subtract 273.15 from 77 K: \[ 77 - 273.15 = -196.15 \]
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Multiply by \(\frac{9}{5}\): \[ -196.15 \times \frac{9}{5} = -352.07 \]
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Add 32: \[ -352.07 + 32 = -320.07 \]
So, 77 K is approximately \(-320.07\) °F.