Pressure & Pascal's Principle - 2 Video Lecture | Fluid Mechanics for Mechanical Engineering

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FAQs on Pressure & Pascal's Principle - 2 Video Lecture - Fluid Mechanics for Mechanical Engineering

1. What is pressure and how is it measured?
Ans. Pressure is the force per unit area applied to an object or substance. It is measured in pascals (Pa), which is equal to one newton per square meter.
2. What is Pascal's principle and how does it relate to pressure?
Ans. Pascal's principle states that when a pressure is applied to a fluid in a confined space, the pressure is transmitted equally in all directions. This means that any change in pressure applied to a fluid will result in an equal change in pressure throughout the entire fluid.
3. How does Pascal's principle apply to hydraulic systems?
Ans. In hydraulic systems, Pascal's principle is utilized to transmit and amplify forces. When a small force is applied to a small piston connected to a fluid-filled pipe, the pressure is transmitted equally throughout the fluid and results in a larger force being exerted by a larger piston connected to the same pipe.
4. What are some real-life applications of Pascal's principle?
Ans. Pascal's principle is applied in various real-life scenarios. Some examples include hydraulic car brakes, hydraulic lifts, hydraulic jacks, and hydraulic systems used in construction equipment. In all these applications, the principle allows for the amplification of force using fluid pressure.
5. How does pressure affect the behavior of gases?
Ans. Pressure has a significant impact on the behavior of gases. As pressure increases, the gas molecules are forced closer together, resulting in a decrease in volume. Conversely, when pressure decreases, the gas molecules spread out and occupy a larger volume. This relationship is described by Boyle's law, which states that the pressure and volume of a gas are inversely proportional when temperature is constant.

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