A standard tire gauge has the lowest reading of 0 psi because it is a device that measures the differential pressure which is the difference between the two pressure.
What is pressure?
The total applied force per unit of area is known as the pressure.
The pressure depends both on externally applied force as well the area on which it is applied.
As given in the problem statement a standard tire gauge has the lowest reading of 0 psi because it is a device that measures the differential pressure.
The ambient air represents the most frequent example. But another comparable option is to employ a vacuum. It measures the absolute pressure in the situation. The atmospheric pressure is measured in the absolute pressure term which comes out to be 14.7 psi.
Thus, The lowest reading is 0 psi on a normal tire gauge since it measures differential pressure or the difference between two pressures.
Learn more about the pressure here,
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