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## Homework Statement

A mercury thermometer contains 7.5 mL of mercury. If the tube of the thermometer has a cross-sectional area of 1.2 mm

^{2}, what should the spacing between the °C marks be? (The volume expansion coefficient for mercury is 1.81 x 10

^{-4}°C

^{−1}.)

## Homework Equations

ΔV=βV

_{0}ΔT

## The Attempt at a Solution

I set ΔT = 1, converted the mL into mm

^{3}.

I got ΔV = [5.43*(10

^{-4})](7500)(1) = 4.0725 mm

^{3}.

However, I don't know what to do with the area!