Physic Quiz: Buoyancy Concepts X

Each of four tires on an automobile has an area of 0.026 m^2 in contact with the ground. The weight of the automobile is 2.6 x 10^4

• 2.4x10^4

• 2.5x10^5

• 2.49x10^4

• 2.5x10^4

Why is the net force on a submerged object called its apparent weight?

• The net force is less than the weight of the object due to the upward force of the buoyant force

• The net force is more than the weight of the object due to the upward force of the buoyant force

• The net force is less than the weight of the object due to the downward force of the buoyant force

• The net force is more than the weight of the object due to the donward force of the buoyant force

__________ is the upward force exerted on an object submerged in a fluid.

An object with a density greater than the fluid it is placed in will sink.

• True

• False

1. 
   An object will float in a fluid if its density is __________ than the density of the fluid.

For incompressible fluids, density changes little with changes in

• Pressure

• Density

• Free-fall accelration

• None of the above

What factors affect the gauge pressure within a fluid?

• Fluid Density

• Depth

• Free-fall acceleration

• All of the above

A solid object is placed in a liquid. The object sinks and displaces a volume of liquid equal to its own volume. Which of the following statements is true?

• The buoyant force on the object is greater than its weight.

• The buoyant force on the object is equal to its weight.

• The buoyant force on the object is less than its weight.

• The buoyant force on the object cannot be determined without additional information.

A balloon is filled with helium gas and released into the air. Which of the following best explains why the balloon rises?

• The density of the helium gas is greater than the density of the surrounding air.

• The density of the helium gas is less than the density of the surrounding air.
  

• The balloon experiences a greater gravitational force than the buoyant force.

• The balloon experiences a greater buoyant force than the gravitational force.

A cube-shaped object with a density of 0.8 g/cm^3 and a side length of 4 cm is placed in a liquid with a density of 1.2 g/cm^3. What will happen to the object?

• The object will sink.

• The object will float

• The object will remain suspended

• The behavior of the object cannot be determined without additional information.