After a long ride a bicycle tire contains air at 95 psig and

After a long ride, a bicycle tire contains air at 95 psig and 125oF. If the altitude is 4360 ft MSL, find the absolute pressure and the pressure head (gage and absolute) in inches of mercury.

Solution

Gauge pressure = 95 psi

Absolute pressure = Gause pressure+ atmospheric pressure.

= 95+14.7

=109.7 psi.

Pressure head (Gauge)= P/unit weight

=95/(0.0048)

=19792 inches.

Pressure head (absolute)= P/unit weight

=109.7/(0.0048)

=22854 inches