A mercury thermometer contains 7.5 mL of mercury. If the tube of the thermometer has a cross-sectional area of 1.2 mm2, what should the spacing between the °C marks be? (The volume expansion coefficient for mercury is 1.81 x 10-4 °C−1.)
The Attempt at a Solution
I set ΔT = 1, converted the mL into mm3.
I got ΔV = [5.43*(10-4)](7500)(1) = 4.0725 mm3.
However, I don't know what to do with the area!