Acceleration Due To Gravity

Q.

Write down the formula for pressure at any given point in a liquid and explain the various symbols used.

Q. A barometer kept in an elevator reads $76\text{cm}$ of mercury when the elevator is at rest. If the elevator goes upwards with some acceleration, the reading of the barometer will be

1. $76\text{cm}$
2. $>76\text{cm}$
3. $<76\text{cm}$
4. zero

Q. A liquid is filled in an open vessel and vessel is accelerated horizontally with a constant acceleration $a$. Choose the correct statements for the given situation.

1. The maximum pressure is at the leftmost bottom corner.
2. Along a horizontal line within the liquid, as we move from left to right, the pressure decreases
3. The pressure at all the points on a line making an angle of ${\tan }^{-1}\left(\frac{a}{g}\right)$ with horizontal would be same
4. Along a horizontal line within the liquid, as we move from left to right, the pressure remains the same

Q. An air bubble in a water tank rises from the bottom to the top. Which of the following statement(s) is/are true?

1. Bubble rises upwards because pressure at the bottom is less than that at the top
2. Bubble rises upwards because pressure at the bottom is greater than that at the top
3. As the bubble rises, its size increases
4. As the bubble rises, its size decreases