Which of the following statements is true about surface tension? * Surface tension is a force directed O perpendicular to the surface of the liquid and is acting towards the surface. Surface tension is responsible for the O ability of some solid objects like needles to "float" on the surface of a liquid. Surface tension measurements may be expressed in dynes or Poise. Surface tension of liquids can be O measured by the capillary rise method using an Ostwald viscometer.
Fluid Pressure
The term fluid pressure is coined as, the measurement of the force per unit area of a given surface of a closed container. It is a branch of physics that helps to study the properties of fluid under various conditions of force.
Gauge Pressure
Pressure is the physical force acting per unit area on a body; the applied force is perpendicular to the surface of the object per unit area. The air around us at sea level exerts a pressure (atmospheric pressure) of about 14.7 psi but this doesn’t seem to bother anyone as the bodily fluids are constantly pushing outwards with the same force but if one swims down into the ocean a few feet below the surface one can notice the difference, there is increased pressure on the eardrum, this is due to an increase in hydrostatic pressure.
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