Two thermometers have identical bulbs and capillaries. One uses ethanol ( γ = 1.1 × 1 0 − 3 ∘ C − 1 ), the other mercury ( γ = 1.8 × 1 0 − 4 ∘ C − 1 ). Ignoring glass expansion, find the ratio of the

Question

Two thermometers have identical bulbs and capillaries. One uses ethanol ( $γ = 1.1 \times 1 0^{- 3}^{\circ} C^{- 1}$ ), the other mercury ( $γ = 1.8 \times 1 0^{- 4}^{\circ} C^{- 1}$ ). Ignoring glass expansion, find the ratio of the length of thread rise (ethanol : mercury) for the same temperature rise (1 decimal).

Answer:

6.10

Solution:

Rise $= γV Δ T / A$ , so the ratio $= 1.1 \times 1 0^{- 3} /1.8 \times 1 0^{- 4} = 6.1$ .

TestHub · Accepted Answer

Rise = γV Δ T / A , so the ratio = 1.1 × 1 0 − 3 /1.8 × 1 0 − 4 = 6.1 .

Physics - Heat & Thermo Question with Solution | TestHub

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