Fluid practice

If an object sinks in a fluid, _____.

• 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
• the density of the fluid is equal to the density of the object
• density has nothing to do with whether an object sinks or floats, only which state of matter the object is

What does viscosity mean?

• How close the particles are together.

• The amount of matter in a substance.

• How easily a fluid flows.

• How dense a fluid is.

When pressure is applied to a confined fluid, the increase in pressure is transmitted equally to all parts of the fluid. This fact is called________.

• Pascal's Principle
• Newton's Principle
• Archimedes' Principle
• Bernoulli's Principle

Which principle do airplanes take advantage of to fly?

• Archimedes' Principle

• Bernoulli's Principle

• Pascal's Principle

When air is moving quicker it's pressure is greater.

• True
• False

Bernoulli’s principle states that the pressure in a fluid decreases as its velocity increases. 

• True
• False

When air is moving quicker it's pressure is greater.

• True
• False

If a hairdryer blows a stream of air between two soda cans hanging side by side, the soda cans will ____________________.

• rise

• move away from each other

• move toward each other

• not move

The figure above shows water entering section 1 of a tube at a speed of 𝑣₁ = 10.0 𝑚/𝑠 through an area of cross-section 𝐴1 = 3.00 𝑚² . The water then flows through a narrower section 2 at a speed of 𝑣₂ = 20.0 𝑚/𝑠.

• 1.5m²

• 2.0m²

• 3.0m²

• 20m²

The figure above shows water entering section 1 of a tube at a speed of 𝑣₁ = 20.0 𝑚/𝑠 through an area of cross-section 𝐴1 = 3.00 𝑚² . The water then flows through a narrower section 2 of area 1𝑚²

• 20.0 𝑚/𝑠

• 3.0 𝑚/𝑠

• 1.0 𝑚/𝑠

• 60.0 𝑚/𝑠