Which of the following statements is true about the experiment on the determination of surface tension of liquids by the capillary rise method? * The aspirator is used to blow and suction air into and out of the capillary tube. The large test tube, capillary tube, and glass tubing should only be rinsed with hydrochloric acid as other liquids might contaminate all the apparatus. The capillary tube should be immersed in the liquid inside the test tube. In setting up the apparatus needed for the experiment, the glass tubing should be immersed in the liquid being investigated.
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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