A mercurial barometer at sea is subject to...

Question 1 of 2707066636ee928f7522a1c519be4

A mercurial barometer at sea is subject to rapid variations in height ("pumping") due to the pitch and roll of the vessel. To avoid this error, measurements of atmospheric pressure at sea are usually measured with a(n) __________.

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Question 1 of 27070

🔍 Key Concepts

• Mercurial barometer vs aneroid barometer – which one uses liquid mercury and which one does not • How ship motion (pitch and roll) affects a column of liquid compared to a sealed mechanical device • Which type of barometer is commonly used on small vessels and aircraft for steady pressure readings

💭 Think About

• Ask yourself: which instrument avoids problems caused by sloshing or moving liquid when the vessel moves? • Think about which device has no liquid column that can "pump" up and down with motion. • Consider which of the listed barometers is specifically designed for use where movement and vibration are common, like at sea or in aircraft.

✅ Before You Answer

• Identify which choices still use mercury in a column (these will still be affected by pitch and roll). • Confirm which option uses a sealed, flexible chamber (vacuum or partial vacuum) instead of liquid. • Eliminate any instrument that requires a vertical, stable liquid column to measure pressure.