Fluid Mechanics (CP)

Which of the following is a fluid?

• Gold

• Helium

• Iron

• Silver

Which of the following statements about floating objects is correct?

• The buoyant force is greater than the weight of the object.

• The buoyant force is less than the weight of the object.

• The buoyant force equals the object’s weight.

• The density of the object is greater than the density of the fluid.

What principle states that any object completely or partially submerged in a fluid experiences an upward buoyant force equal in magnitude to the weight of the fluid displaced by the object?

• Archimedes' Principle

• Bernoulli's Principle

• Newton's Principle

• Pascal's Principle

What happens to the pressure of an object as the area between the object and the surface increases?

• The pressure decreases.

• The pressure increases.

• The pressure remains the same.

Which principle states that the pressure in a fluid decreases as its velocity increases?

• Archimedes' Principle

• Bernoulli's Principle

• Newton's Principle

• Pascal's Principle

A person is standing near the edge of a railroad track when a high-speed train passes. What happens to the person?

• He or she is pushed away from the train.

• He or she is pushed upward in the air.

• He or she is pulled toward the train.

• He or she is pushed downward into the ground.

Tags

NGSS.HS-PS2-1

What are the three variables that completely describe the macroscopic state of an ideal gas?

• Pressure, Temperature, and Energy

• Pressure, Temperature, and Volume

• Pressure, Volume, and Energy

• Volume, Temperature, and Energy

What must the units of temperature be in order to be used in the ideal gas law?

• Celsius

• Fahrenheit

• Joules

• Kelvin

A balloon filled with air is compressed to half its initial volume. If the temperature inside the balloon remains constant, what happens to the pressure inside the balloon?

• It doubles.

• It is half its original value.

• It is 4 times as great.

• It remains the same.

Which is NOT a unit of pressure?

• Atmosphere

• Pascal

• PSI (Pounds per Square Inch)

• Newton