question_answer

A barometer accelerating downwards reads 76 cm of Hg. What will be the possible air pressure inside the jar?

Answer:

                The net acceleration of the elevator accelerating downwards \[=g-a\] \[\therefore \] Pressure inside the elevator \[=h\rho (g-a)=\frac{76\times 13.6\times (g-a)}{13.6\times g}\text{ cm of Hg}\] Clearly, this pressure will be less than 76 cm of Hg.