Question

what is pressure ?give example of a pressure ?write SI unit of pressure?
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Answer 1

Answer:

pascal

Unit of pressure: pascal (Pa)

Pressure is the amount of force applied perpendicular to the surface of an object per unit area and the for it is p (or P). The SI unit for pressure is the pascal (Pa), equal to one newton per square metre (N/m2, or kg·m−1·s−2).

Answer 2

Answer:

• Pressure, in the physical sciences, the perpendicular force per unit area, or the stress at a point within a confined fluid.
• example of pressure may be seen by holding a knife to a piece of fruit. If you turn the blade so the cutting edge is pressed into the fruit, the same force is applied over a much smaller surface area (vastly increased pressure), so the surface cuts easily.
• In SI units, pressure is measured in pascals; one pascal equals one newton per square metre. Atmospheric pressure is close to 100,000 pascals.