A motor-car tyre is checked at sea level where the atmospheric pressure is
PHYSICS · Multi-part · CBSE · Physics · Mechanical Properties of Fluids · Mechanical Properties of Fluids
Problem
A motor-car tyre is checked at sea level where the atmospheric pressure is 1.013×105Pa. The mechanic’s pressure gauge shows a reading of 220kPa for the air inside the tyre.
(i) Calculate the absolute pressure of the air inside the tyre in Pascal.
(ii) Express the absolute pressure obtained in part (i) in bar and in millimetres of mercury, taking 1atm=1.013×105Pa=760mm Hg.
(iii) If the same tyre is carried without temperature change to a hill station where the atmospheric pressure is 0.85atm, determine the new gauge reading that the same instrument would show.