A laboratory thermometer has a range from -10 degrees Celsius to 110 degrees Celsius and 120 equal divisions. What is the smallest value that this thermometer can read?
1 degree Celsius
To find the smallest value that the thermometer can read, we need to calculate the least count of the thermometer. The least count is the smallest and most precise measurement that an instrument can accurately measure.
Let's calculate the least count with the following steps:
- Identify the total range of the thermometer:
- The thermometer range is from \(-10\) degrees Celsius to \(110\) degrees Celsius.
- Total range = \(110 - (-10) = 120\) degrees Celsius.
- Determine the number of divisions on the thermometer:
- There are \(120\) equal divisions on the thermometer.
- Calculate the least count:
- The least count is given by the formula:
- \(\text{Least Count} = \frac{\text{Total Range}}{\text{Number of Divisions}}\)
- Substitute the values into the formula:
- \(\frac{120}{120} = 1\) degree Celsius.
Thus, the smallest value that the thermometer can read is \(1\) degree Celsius.
Therefore, the correct answer is 1 degree Celsius.
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