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Questions and Answers
What causes surface tension in liquids?
What causes surface tension in liquids?
What are the three types of pressure measurements?
What are the three types of pressure measurements?
What is the unit of measurement for surface tension in the SI system?
What is the unit of measurement for surface tension in the SI system?
What type of pressure measurement is used for extreme vacuum pressures?
What type of pressure measurement is used for extreme vacuum pressures?
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What is the shape of liquid droplets determined by?
What is the shape of liquid droplets determined by?
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What is atmospheric pressure typically at sea level?
What is atmospheric pressure typically at sea level?
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What is the difference between vented gauge (vg) and sealed gauge (sg) reference pressure?
What is the difference between vented gauge (vg) and sealed gauge (sg) reference pressure?
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What is the relationship between surface tension and the force required to increase surface area?
What is the relationship between surface tension and the force required to increase surface area?
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What is the maximum surface tension that water can have at 20°C?
What is the maximum surface tension that water can have at 20°C?
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What type of pressure measurement is commonly used in industrial process systems?
What type of pressure measurement is commonly used in industrial process systems?
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What is the work done to increase the surface area of a liquid stored as?
What is the work done to increase the surface area of a liquid stored as?
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What is the zero reference used in pressure measurements?
What is the zero reference used in pressure measurements?
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What are electronic pressure instruments used for?
What are electronic pressure instruments used for?
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What is the method used to measure surface tension that involves a plate suspended on the surface of a liquid?
What is the method used to measure surface tension that involves a plate suspended on the surface of a liquid?
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What natural phenomena are affected by surface tension?
What natural phenomena are affected by surface tension?
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Study Notes
Surface tension is caused by cohesive forces between molecules of a liquid, resulting in a net force of zero for molecules away from the surface and forces causing the surface to contract. The balance between cohesion and adhesion determines the degree of wetting and shape of meniscus. Surface tension is responsible for the shape of liquid droplets, which tend to be pulled into a spherical shape by the imbalance in cohesive forces. Surface tension can be defined in terms of force or energy and is measured in force per unit length. It is proportional to the force required to increase the surface area and is equal to the ratio of the force required to stop a movable side from sliding to the length of the immobile side. It is also equal to the ratio of the change in energy of the liquid to the change in surface area of the liquid.Surface tension is a measure of the cohesive forces that hold the molecules of a liquid together. It can be measured in SI system as joules per square meter and in the cgs system as ergs per cm2. The work done to increase the surface area of a liquid is stored as potential energy. A free droplet of liquid assumes a spherical shape which has the minimum surface area for a given volume. The equivalence of measurement of energy per unit area to force per unit length can be proven by dimensional analysis. There are several methods to measure surface tension which include the drop weight method, capillary rise method, maximum bubble pressure method, and Wilhelmy plate method. Water has a surface tension of 72.8 mN/m at 20°C. Surface tension has effects on various natural phenomena such as capillary action, wetting, and flotation.
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Description
Test your knowledge of surface tension with this quiz. Learn about the cohesive forces that hold molecules of liquids together, the balance between cohesion and adhesion, and the effects of surface tension on natural phenomena such as capillary action and wetting. Find out about the different methods used to measure surface tension and the units of measurement. Challenge yourself with questions about the properties of surface tension and its practical applications. Take this quiz and become an expert on the fascinating topic of surface tension!
