Question

write the Absolute Pressure and Gauge Pressure​

Answer 1

$\huge\bf{\underline{\underline{Answer : -}}}$

Assume an imaginary cylinder of horizontal base area A and height x1

- x2 = h. x1 and x2 being the heights measured from a reference point, height increasing upwards:

x1 > x2

. The vertical forces acting on the cylinder are:

1. Force F_1 acts downwards at the top surface of the cylinder, and is due to the weight of the water column above the cylinder.

2. Force F_2 acts upwards at the bottom surface of the cylinder, and is due to the water below the cylinder.

3. The gravitational force on the water

enclosed in the cylinder is mg, where m is the mass of the water in the cylinder. As the water is in static equilibrium, the forces on the cylinder are balanced. The balance of these forces in magnitude is written as,

F_2= F_1+ mg

Answer 2

Answer:

Absolute pressure is zero- referenced against a perfect vacuum, so it is equal to gauge pressure plus atmospheric pressure. gauge pressure is zero referenced against ambient air pressure, so it is equal to absolute pressure minus atmospheric pressure. Negative signs are usually omitted.