Question

Describe an experment to show that pressure increase with decerase in the area of surface​

Answer 1

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The pressure is the force per unit area. So, P=F/A

Thus the pressure P is inversely proportional to contact area A.

So when area increases , the pressure will be decreasing.

...................................

1. INTRODUCTION

Hydrostatic forces are the resultant force caused by the pressure loading of a liquid acting on submerged surfaces. Calculation of the hydrostatic force and the location of the center of pressure are fundamental subjects in fluid mechanics. The center of pressure is a point on the immersed surface at which the resultant hydrostatic pressure force acts.

2. PRACTICAL APPLICATION

The location and magnitude of water pressure force acting on water-control structures, such as dams, levees, and gates, are very important to their structural design. Hydrostatic force and its line of action is also required for the design of many parts of hydraulic equipment.

3. OBJECTIVE

The objectives of this experiment are twofold:

To determine the hydrostatic force due to water acting on a partially or fully submerged surface;

To determine, both experimentally and theoretically, the center of pressure.

4. METHOD

In this experiment, the hydrostatic force and center of pressure acting on a vertical surface will be determined by increasing the water depth in the apparatus water tank and by reaching an equilibrium condition between the moments acting on the balance arm of the test apparatus. The forces which create these moments are the weight applied to the balance arm and the hydrostatic force on the vertical surface.

5. EQUIPMENT

Equipment required to carry out this experiment is the following:

Armfield F1-12 Hydrostatic Pressure Apparatus,

A jug, and

Calipers or rulers, for measuring the actual dimensions of the quadrant.

Answer 2

The pressure is the force per unit area. So, P=F/A

Thus the pressure P is inversely proportional to contact area A.

So when area increases , the pressure will be decreasing.

...................................

1. INTRODUCTION

Hydrostatic forces are the resultant force caused by the pressure loading of a liquid acting on submerged surfaces. Calculation of the hydrostatic force and the location of the center of pressure are fundamental subjects in fluid mechanics. The center of pressure is a point on the immersed surface at which the resultant hydrostatic pressure force acts.

2. PRACTICAL APPLICATION

The location and magnitude of water pressure force acting on water-control structures, such as dams, levees, and gates, are very important to their structural design. Hydrostatic force and its line of action is also required for the design of many parts of hydraulic equipment.

3. OBJECTIVE

The objectives of this experiment are twofold:

To determine the hydrostatic force due to water acting on a partially or fully submerged surface;

To determine, both experimentally and theoretically, the center of pressure.

4. METHOD

In this experiment, the hydrostatic force and center of pressure acting on a vertical surface will be determined by increasing the water depth in the apparatus water tank and by reaching an equilibrium condition between the moments acting on the balance arm of the test apparatus. The forces which create these moments are the weight applied to the balance arm and the hydrostatic force on the vertical surface.

5. EQUIPMENT

Equipment required to carry out this experiment is the following:

Armfield F1-12 Hydrostatic Pressure Apparatus,

A jug, and

Calipers or rulers, for measuring the actual dimensions of the quadrant.