Question

what does a barometer measure? what is the si unit of the physical quantity it measures? multiple choice humidity of the surrounding fluid in g/cm³. wind speed in m/s. temperature of the fluid in kelvins (k). absolute pressure of the fluid in pascals (pa or n/m²).

Explanation:

A barometer measures pressure (specifically atmospheric pressure, a type of absolute pressure). The SI unit of pressure is Pascal (Pa), equivalent to \( \text{N/m}^2 \). Other options are incorrect: humidity is measured by hygrometers, wind speed by anemometers, and temperature by thermometers.

Answer:

D. Absolute pressure of the fluid in Pascals (Pa or \( \text{N/m}^2 \)).