Pressure

Question 1

Definition

Answer 1

• Pressure is the force applied acting over an area
• Depends on force and coverage area
• SI Unit - N m^-2 (Pascal)

Question 2

Pascal’s Law Definition

Answer 2

Pressure in a liquid is transmitted equally in all directions

Question 3

Variation of Pressure With Depth Definition

Answer 3

The increase in pressure that occurs as you go deeper into a fluid

Question 4

Average pressure formula

Answer 4

P = F/A

Question 5

Density Formula

Answer 5

Density (p) = m/V

where,
m = mass
V = Volume

Question 6

Pressure with depth formula

Answer 6

P = Pa + pgh

where,
Pa = 1 atom = 1.01 X 10^5 Pascal
p = Density
g = gravity
h = height or depth

Question 7

Gauge Pressure Formula

Answer 7

P - Pa = pgh

Question 8

Name 2 pressure measuring instruments

Answer 8

• Mercury Barometer
• Open Tube Manometer

Question 9

Hydraulic Press Formula

Answer 9

P = f/a = W/A
and
f = W X a
———-
A

where,

f = force applied
a = area of small piston
W = work done by larger piston
A = Area of larger piston

Question 10

Hydrostatic Paradox

Answer 10

This paradox states that water pressure depends on the vessel’s depth, not its shape or size.

Question 11

Archimedes Principle

Answer 11

When a body is submerged in a fluid, the fluid exerts a perpendicular force on each surface, and their sum is the buoyant force.