Question

Define pressure. Mention any two applications of pressure

Answer 1

Answer:

Applications of Pressure in Daily Life. Some of the applications of pressure are given below. ... When air is sucked out of a drinking straw, the air pressure inside if decreases and the atmospheric pressure outside forces the liquid to go inside the straw. Skis have a large area to reduce the pressure on the snow.

Pressure is an expression of force exerted on a surface per unit area. The standard unit of pressure is the pascal (Pa), equivalent to one newton per meter squared (N/m 2 or N. · m -2).

Explanation:

Pressure is an expression of force exerted on a surface per unit area. The standard unit of pressure is the pascal (Pa), equivalent to one newton per meter squared (N/m 2 or N · m -2). Alternatively, pressure can be measured in dynes per centimeter squared (dyn/cm 2 or dyn · cm -2). To convert from pascals to dynes per centimeter squared, multiply by 10. Conversely, multiply by 0.1.

Consider an enclosed chamber filled with a gas and surrounded by a vacuum. The pressure exerted on the walls of the chamber by the gas depends on three factors: (1) the amount of gas in the chamber, (2) the temperature of the gas, and (3) the volume of the chamber. As the amount of gas increases, assuming the volume of the chamber and the temperature remain constant, the pressure increases. As the temperature increases, assuming the amount of gas and the size of the chamber remain constant, the pressure increases. As the volume of the chamber increases, assuming the amount of gas in the chamber and the temperature remain constant, the pressure decreases. These are idealized examples; in practical scenarios these three factors often interact.

The pressure of the Earth's atmosphere at sea level is approximately 10 5 Pa. A unit of 100 Pa is known as a millibar (mb); atmospheric pressure is generally about 1,000 mb at sea level.

Answer 2

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Applications of pressure:-

1) A syringe consists of a tight-fitting piston which moves in a cylinder, with a nozzle at one end also works with the help pressure.

2)When air is sucked out of a drinking straw ,the air pressure inside it decreases and the atmospheric pressure outside forces the liquid to go inside the straw.

3)A vacuum cleaner has a fan inside that creates a low pressure inside the device . Consequently,air and dirt particles are sucked into the device.

4)Siphon is only a rubber cylinder utilised for exchange fluid with the help of pressure.

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