# Question Video: Calculating Temperature Difference Using Thermometers Physics

The figure shows two thermometers that measure different temperatures. What is the difference in the readings on the thermometers?

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### Video Transcript

The following figure shows two thermometers that measure different temperatures. What is the difference in the readings on the thermometers? Is it (A) five degrees Celsius, (B) two degrees Celsius, (C) six degrees Celsius, or (D) 20 degrees Celsius?

This question is asking us to read the two temperatures marked on these two thermometers and calculate their difference in temperature. Looking first at the scales of the thermometers, we can see that they both measure in units of degrees Celsius and use the same scale, which is marked every one degree C.

Let’s call the thermometer on the left thermometer one and the one on the right thermometer two. Looking closely at thermometer one, we can see that it indicates a temperature of 25 degrees Celsius, while thermometer two indicates a temperature of 19 degrees Celsius.

To find the difference in temperature, we just subtract the smaller value from the larger one, so in this case 19 degrees Celsius from 25 degrees Celsius. This gives us a temperature difference of six degrees Celsius. So, the correct answer is option (C), six degrees Celsius.