Statics and Fluids

Which statement best distinguishes a liquid from a gas in terms of molecular interaction?

• Gases have stronger intermolecular forces

• Liquids have fixed shape and volume

• Gases lack a defined volume due to negligible intermolecular forces

• Liquids occupy the entire volume of their container

What primarily determines the compressibility of a fluid?

• It’s temperature

• The speed of the fluid

• Molecular arrangement and interactions

• Is viscosity

Which of the following is NOT true regarding density?

• Ice has a greater density than water

• Density equals mass divided by volume

• Density decreases when a substance is heated and expands

• Two objects with the same volume but different masses have different densities

What is the density (in kg/m3) of a substance that weighs 300g and occupies 200cm^3?

• 1.5 kg/m³

• 1500 kg/m³

• 0.67 kg/m³

• 667 kg/m³

An ideal fluid is characterized by which of the following?

• Constant viscosity and compressibility

• Absence of viscosity

• Variable density and pressure

• High surface tension

What distinguishes a perfect fluid from an ideal fluid?

• A perfect fluid has zero density

• A perfect fluid is compressible

• A perfect fluid has constant density and no viscosity

• A perfect fluid has surface tension

Which of the following correctly orders states of matter by increasing density ( least to most)?

• Solid < liquid < gas

• Gas < solid < liquid

• Gas < liquid < solid

• Liquid < gas < solid

When comparing two equal-volume substances, the denser substance will:

• Always float in the other

• Have less mass

• Displace less fluid when submerged

• Have more mass

Which factor does NOT affect the pressure at a point in a fluid at rest?

• Depth of the point

• Fluid density

• Gravitational acceleration

• Fluid volume

In hydrostatics, the pressure difference between two points at different depths in a fluid is proportional to:

• The square of the depth

• The fluids compressibility

• The vertical distance between two points

• The containers shape