Calculate the absolute pressure if a barometer is - 40 mmHg of gauge pressure

Answer 1

To calculate the absolute pressure, we need to add the atmospheric pressure to the gauge pressure.

Given that the gauge pressure is -40 mmHg, we know that it is below atmospheric pressure. If atmospheric pressure is typically around 760 mmHg, we can calculate the absolute pressure by adding the gauge pressure to the atmospheric pressure.

Absolute Pressure = Atmospheric Pressure + Gauge Pressure

Absolute Pressure = 760 mmHg + (-40 mmHg)

Absolute Pressure = 720 mmHg