Question

An accurate Celsius thermometer and a faulty Fahrenheit thermometer read ${60}^{\circ }C$ and ${141}^{\circ }F$ respectively when placed in the same bath. Find the error in the Fahrenheit thermometer.

• A. ${11}^{\circ }F$
• B. $1^{\circ }F$
• C. ${13}^{\circ }F$
• D. ${0.5}^{\circ }F$

Answer 1

Answer: (B)

$1^{\circ }F$

The conversion formula for Fahrenheit to Celsius conversion is
$\frac{C}{5}=\frac{(F-32)}{9}$.
Using this, the ${60}^{\circ }C={140}^{\circ }F$. So the error in the Fahrenheit thermometer which registers ${141}^{\circ }F$ is $=1^{\circ }F$.