Multiple choice general knowledge science & technology

What is minus 40 degrees Farenheit expressed as degrees Centigrade

  1. minus 40

  2. 40

  3. 100

  4. 20
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A Correct answer
Explanation

-40°F equals -40°C because the Fahrenheit and Celsius scales intersect at this point. The conversion formula is C = (F - 32) × 5/9. At -40°F: (-40 - 32) × 5/9 = -72 × 5/9 = -40°C. This is the only temperature where both scales read the same numerical value.

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