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Mechanical Properties of Fluids in One Shot (NCERT) Video Lecture | Physics Class 11 - NEET
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FAQs on Mechanical Properties of Fluids in One Shot (NCERT) Video Lecture - Physics Class 11 - NEET
| 1. What are the mechanical properties of fluids? |  |
Ans. The mechanical properties of fluids include viscosity, density, surface tension, compressibility, and elasticity. Viscosity refers to the resistance of a fluid to flow, while density is the mass per unit volume of a fluid. Surface tension is the force acting at the surface of a liquid that causes it to behave like a stretched elastic sheet. Compressibility pertains to the ability of a fluid to be reduced in volume under the application of pressure. Lastly, elasticity refers to the ability of a fluid to deform and regain its original shape when a force is applied and removed.
| 2. How is viscosity measured? | |
Ans. Viscosity can be measured using various instruments such as viscometers. One commonly used viscometer is the Ostwald viscometer, which measures the time taken for a fixed volume of fluid to flow through a capillary tube under the influence of gravity. Another method is the rotational viscometer, which measures the torque required to rotate a spindle in a fluid at a constant speed. The higher the viscosity, the more resistance there is to flow, and thus, the longer it takes for the fluid to flow through the viscometer.
| 3. What is the significance of surface tension in fluids? | |
Ans. Surface tension plays a crucial role in various phenomena such as capillary action, meniscus formation, and formation of droplets. It is responsible for the upward movement of a liquid in a narrow tube against the force of gravity during capillary action. Surface tension also causes liquids to form a curved surface at the boundary with air or another medium, resulting in the formation of a meniscus. Moreover, surface tension allows liquids to form spherical droplets due to the minimization of the surface area, as seen in raindrops or water droplets on a surface.
| 4. How does compressibility affect fluid behavior? | |
Ans. Compressibility determines how much a fluid's volume can change under the application of pressure. Incompressible fluids, such as water, have very low compressibility and undergo negligible volume changes even with significant pressure variations. On the other hand, compressible fluids, such as gases, can be highly compressed or expanded by applying pressure changes. The compressibility of a fluid affects its response to external forces and its ability to transmit pressure waves, which is crucial in areas such as acoustics and fluid dynamics.
| 5. How does elasticity relate to fluid behavior? | |
Ans. Elasticity in fluids refers to their ability to deform under the application of a force and return to their original shape when the force is removed. While liquids are generally considered to be inelastic, they do exhibit some degree of elasticity. For example, when a force is applied to a liquid, it deforms momentarily but quickly regains its original shape once the force is removed. This property is essential in processes such as fluid flow, where the fluid needs to adjust to the changing conditions and then revert to its original state.
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Oct 24, 2024 Last updated |
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