Pressure

Question 1

What is pressure in solids?

Answer 1

Pressure is the force that acts on an area.

Question 2

What is the formula for pressure in solids?

Answer 2

𝑃 = 𝐹/𝐴
(Pressure = Force / Area).

Question 3

What are the units of pressure in solids?

Answer 3

N/cm², N/m², or Pascals (Pa), where 1 Pa = 1 N/m².

Question 4

What is pressure in liquids?

Answer 4

Pressure in liquids is the force exerted on the surrounding container.

Question 5

What is the formula for pressure in liquids?

Answer 5

P = ρgh
(Pressure = Density × Gravity × Height).

Question 6

What unit is used for liquid pressure?

Answer 6

Pascals (Pa), ensuring all values are in meters.

Question 7

What is atmospheric pressure?

Answer 7

The pressure exerted by the air around us.

Question 8

How do you calculate total pressure in a liquid?

Answer 8

Total Pressure = Atmospheric Pressure + Pressure due to Liquid.

Question 9

What does it mean that fluid pressure is isotropic?

Answer 9

It means that pressure in a fluid is exerted equally in all directions—a principle known as Pascal’s Principle.

Question 10

What is the difference between gauge pressure and absolute (total) pressure?

Answer 10

• Gauge pressure is measured relative to atmospheric pressure
• Absolute pressure is the total pressure including atmospheric pressure.