Pressure on liquid

Diagram shows the design of a dam. Why does the thickness of the dam increase with its depth?

• The design of this structure is stronger.

• Water pressure increases with depth.

• The cost of construction is lower.

• Water pressure acts uniformly in all directions.

Which length is used to measure the pressure of liquid get by the fish?

• A

• B

• C

• D

When divers return to the surface of water quickly, the pressure is ________.

• Increased

• Decreased

• Not changing

The pressure in a liquid or gas is measures by a _________.

• Viscosity

• Pressure Plate

• Pressure Gauge

• Pressure Counter

Consider a sample of water in the tank above. Let us mark a point at each side: A, B, C, and D as shown. What statement is correct about those four point?

• hydrostatic pressure at point A is greater than hydrostatic pressure at point B

• hydrostatic pressure at point B is greater than hydrostatic pressure at point A

• hydrostatic pressure at point C is greater than hydrostatic pressure at point D

• hydrostatic pressure at point D is greater than hydrostatic pressure at point C

Which of the statements is true?

• The bottom of the boot exerts more pressure than the shoe as a result of an increase in surface area.
• The bottom of the shoe exerts more pressure than the boot as a result of an decrease in surface area.
• The bottom of the shoe exerts the same pressure as the bottom of the boot.

A force of 500 N is given to 0.02 m². What is the pressure?

• 25 Pa

• 25 kPa

• 10 Pa

• 0.04 kPa

Liquid X has smaller density than liquid Y. Which tube has the smallest pressure by the liquid?

• A

• B

• C

• D

A box has a mass of 5 kg. What is the contact are between the box and the floor to produce pressure of 20 Pa?

Why is it hard to cut using a dull knife?

• A dull knife has larger contact area than the sharp one, so its pressure is greater.

• A dull knife has smaller contact area than the sharp one, so its pressure is greater.

• A sharp knife has larger contact area than the sharp one, so its pressure is greater.

• A dull knife has larger contact area than the sharp one, so its pressure is smaller.