IB HL Fluid Dynamics

Which of the following properties is NOT a characteristic of an ideal fluid?

• laminar flow (e.g. magical water fountains)
• turbulent flow (e.g. water rapids)
• nonviscous
• incompressable

Which of the following statements is NOT correct?

• a fluid flows
• a fluid has a definite shape
• molecules of a fluid are free to move past each other
• a fluid changes its shape easily

How does a liquid differ from a gas?

• a liquid has both definite shape and definite volume, whereas a gas has neither
• a liquid has a definite volume, unlike a gas
• a liquid has a definite volume like a  gas
• da liquid has a definite shape whereas a gas has a definite volume

Which of the following statements about floating objects is correct?

• the object's density is greater than the density of the fluid on which it floats
• the object's density is equal to the density of the fluid on which it floats
• The volume of displaced fluid is greater than the volume of the object
• The buoyant force equals the object's weight of the displaced fluid

If an object is only partially submerged in a fluid, which of the following is true.

• the volume of the displaced fluid equals the volume of the object
• the density of the fluid equals the density of the object
• the density of the fluid is greater than the density of the object
• the density of the fluid is less than the density of the object

Which of the following is true according to Pascal's principle?

• pressure in a fluid is greatest at the walls of the container holding the fluid
• pressure in a fluid is greatest at the centre of the fluid
• pressure in a fluid is the same throughout the fluid
• pressure in a fluid is greatest at the top of the fluid

Which of the following is NOT an example of units for expressing pressure?

• N/m²
• kg/m²
• atm
• Pa

A buoyant force acts in the opposite direction of gravity. Therefore, which of the following is true of an object completely submerged in water?

• the net force on the object is smaller than the weight of the object
• the net force on the object is larger than the weight of the object
• the net force on the object is equal to the weight of the object
• the object appears to weigh more than it does in air.

The rule that the buoyant force on an object is equal to the weight of the fluid the object displaces.

• Pascal's principle
• Bernoulli's principle
• Archimedes' principle
• Newton's Law

The rule that when force is applied to a confined fluid, the increase in pressure is transmitted equally throughout.

• Pascal's principle
• Bernoulli's principle
• Archimedes' principle
• Newton's Law