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Which physical quantity is measured using a manometer?
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7. Gases
Pressure Units
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A manometer is used to measure which of the following quantities?
A
Temperature
B
Volume
C
Pressure
D
Density
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Understand the purpose of a manometer: it is a device used to measure the pressure of a gas or liquid.
Recall that temperature is measured with thermometers, volume is measured with volumetric tools like graduated cylinders, and density is calculated from mass and volume measurements.
Recognize that a manometer typically consists of a U-shaped tube filled with a liquid (often mercury or water) and measures the difference in liquid height to determine pressure.
Know that the pressure difference causes the liquid levels in the manometer to change, and this height difference can be related to pressure using the formula \(P = \rho g h\), where \(\rho\) is the liquid density, \(g\) is acceleration due to gravity, and \(h\) is the height difference.
Conclude that the manometer is specifically designed to measure pressure, not temperature, volume, or density.
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