Chapter 7: Fluid Mechanics

Which of the following is not a phase of matter?

• Gel
• Gas
• Solid
• Liquid

Which of the following is characterized as fluid?

• Ice
• Plasma
• Solid
• Liquid or gas

What is density?

• Density is mass per unit volume.
• Density is the weight of an object.
• Density is the volume of an object divided by its mass.
• Density is the temperature of a substance.

Choose the correct SI unit for density.

• kg/m³
• kg/L
• g/mL
• g/cm³

If a car has 1000 kg mass, and its volume is 2 m³ , what is the car density?

• 250 kg/m³
• 1000 kg/m³
• 200 kg/m³
• 500 kg/m³

Steel wrench and steel nail have the same density. Is the statement correct?

• Yes, the statement is correct.
• No, the statement is incorrect.
• The density of steel varies between objects.
• Only the steel wrench has a different density.

What is definition for pressure in Physics?

• Pressure is the volume of a gas.
• Pressure is the force per unit area.
• Pressure is the weight of an object.
• Pressure is the temperature of a substance.

Which of the following units are not the units for pressure?

• Meters (m) and kilograms (kg)
• Atmospheres (atm)
• Pascals (Pa)
• Bar (bar)

Convert 10 N/m² to the unit of Pa.

• 10 Pa
• 10 N/m
• 100 Pa
• 1 N/m^2

Given that the 5 Pa pressure acts on 2 m² area. Find the magnitude of force.

• 5 N
• 20 N
• 10 N
• 15 N