Task 2.1 - Determine pressure in fluid systems due to height and depth

For all questions take the gravitational acceleration as 9.8 m/s2

Determine the pressure acting at the base of a dam of a depth of 42m. Take the density of water as 1000 kg/m3. (Give you answer in kPa to 3 significant figures)

The pressure at a depth of 350mm below the free surface of a fluid is measured by a U-tube manometer. If the pressure at this depth is 5694Pa, calculate the density of the liquid used in the manometer.

Calculate the gauge pressure, and the absolute pressure, on a diver in the sea at a depth of 25m. Take the atmospheric pressure at sea level to be 101KPa.

(assume the density of seawater is 1030kg/m3)

D)

The two experiments below are carried out under identical and constant atmospheric conditions.

i) If the barometric height (h) reading in a mercury barometer gives a height of 750 mm of mercury, calculate the atmospheric pressure (PA).

ii) A U-tube manometer containing mercury (shown below) gives a height difference (h1) reading of 280 mm of mercury when connected to a gas cylinder. Calculate the pressure of the gas in the cylinder, correct to 3 significant figures.

(Take the density of mercury to be 13600kg/m3)