Question

1. What is the force per unit area?
2. what does pressure due to liquid depend upon?
3. what happens to pressure if the area of contact decreases
4. Name the instrument used to measure the pressure in liquid
5. Name the SI unit of pressure​

Answer 1

Answer:

Pascal

Newton

Explanation:

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Answer 2

Answer:

1. Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure (also spelled gage pressure) is the pressure relative to the ambient pressure. Various units are used to express pressure.
2. Pressure within a liquid depends only on the density of the liquid, the acceleration due to gravity, and the depth within the liquid.
3. Since pressure is defined as Force/Area, a decrease in the area over which force is applied would result in an increase in pressure on this area. ... This is because moving your thumb over the opening reduces the area over which force is applied. As a result, pressure increases.
4. Instruments used to measure and display pressure in an integral unit are called pressure meters or pressure gauges or vacuum gauges. A manometer is a good example, as it uses the surface area and weight of a column of liquid to both measure and indicate pressure.
5. The SI unit for pressure is the pascal (Pa), equal to one newton per square metre (N/m2, or kg·m−1·s−2). Pascal is a so-called coherent derived unit in the SI with a special name and symbol.

Explanation:

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