PHYSICS CHAPTER 2 : PRESSURE

What is the formula for liquid pressure?

• P=pg

• P=hpg

• P=hg

Pressure in liquids is not affected by the

• mass or size

• density or size

• size or shape

The S.I unit for pressure is

• pascal (Pa)

• mm Hg

• m H2O

• millibar (mbar)

Formula of actual pressure is

• P=hpg + P atm

• P=hpg

• h=p/pg

A fish is at a depth of 2m in an aquarium and it have 1025 kg m‐³ density of water.

(Gravitational acceleration = 9.81 ms-²)

What is the pressure experienced by the fish?

• 20110.5 Pa

• 20210.5 Pa

• 20111.5 Pa

• 20012.5 Pa

The density of water in thr pool is 1000 kg m³.

(Gravitational acceleration = 9.81 ms-²)

What is the pressure exerted by the water at X ?

• 2.5 x 10‐² Pa

• 2.5 x 10² Pa

• 4.0 x 10⁴ Pa

• 4.0 x 10³ Pa

• 4.0 x 10-² Pa

Which is the correct comparison of the pressure at Q and P ?

• Pressure at Q > Pressure at P

• Pressure at Q = Pressure at P

• Pressure at Q < Pressure at P

A diver dives to a depth of 30m in the sea. What is the actual pressure acting on his body?

Density of sea water, P=1060 kg m-³

Gravitational acceleration, g=9.81 ms-²

Atmospheric pressure = 100 kPa

• 411 kPa

• 412 kPa

• 413 kPa

Figure shows a U-tube filled with water and liquid P is insoluble in water. Given that the density of water is 1000 kg/m³, find the density of liquid P.

• 833 kg m-³

• 834 kg m-³

• 835 kg m-³

The diagram shows a U-tube filled with two types of liquid. X and Y which are not mixable. If the density of liquid X and liquid Y are 1200 kg/m³ and 800 kg/m³ respectively, find the value of h.

• h=15 cm

• h=20 cm

• h=25 cm