Form 4 CHp 3.2 Pressure In Liquids

What happens to pressure as you go deeper under water?

• it increases
• it decreases
• it stays the some
• no soup for you!

The pressure of water exerted on the fishes is P_X, P_Y and P_Z respectively.
Which comparison is correct about the pressure exerted on the fishes?

• P_Z > P_Y > P_X 
• P_Z = P_X < P_Y
• P_Z = P_X > P_Y
• P_Z < P_X < P_Y

Calculate the pressure exerted by the water on the fish.
[Density of water = 1 000 kg m⁻³]

• 5 × 10⁴ Pa
• 5 × 10⁷ Pa
• 5 × 10⁶ Pa
• 5 × 10^-1 Pa

Calculate the pressure of the water at M.
[Density of water = 1 000 kg m⁻³]

• 1.0 × 10⁵ N m⁻²
• 1.5 × 10⁵ N m⁻²
• 2.2 × 10⁵ N m⁻²
• 2.5 × 10⁵ N m⁻²

Steam less dense than water because

• steam particles are further apart from each other
• steam particles have a higher kinetic energy
• steam particles are smaller and lighter
• steam particles have larger volume

Which of the following graphs shows the correct relationship between water pressure, p and depth, h of the water?

• A
• B
• C
• D

Two identical containers containing liquid M and liquid N with 28 cm height and 20 cm height respectively. Both containers produce the same water spurt.
If the density of liquid M is 2.0 g cm⁻³, find the density of liquid N.

• 0.70 g cm⁻³
• 1.40 g cm⁻³
• 1.43 g cm⁻³
• 2.80 g cm⁻³

160 g of soft drink is mixed with 530 cm³ of water. The volume of the mixture becomes 750 cm³.
Calculate the density of the mixture.
[Density of water is 1 g cm⁻³]

• 0.21 g cm⁻³
• 0.71 g cm⁻³
• 0.92 g cm⁻³
• 1.09 g cm⁻³

Given that the pressure of sea water at the bottom of an ocean is 7.65 × 10⁷ N m⁻², calculate the depth of the ocean.
[Density of sea water = 1.02 × 10³ kg m⁻³]

• 7.5 × 10⁸ m
• 7.5 × 10⁴ m
• 7.5 × 10³ m
• 7.5 × 10² m

Arrange the density of spheres, W, X, Y and Z, in descending order.

• X, Y, W, Z
• Y, X, W, Z
• X, W, Y, Z
• W, Z, X, Y