Fluids Success Criteria Quiz

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Questions and Answers

What characteristic distinguishes cohesion from adhesion in fluids?

Cohesion applies to gases only, while adhesion applies to liquids.
Cohesion involves the attraction between different substances, while adhesion involves attraction between similar substances.
Cohesion is the force that holds similar molecules together, while adhesion is the force that holds different molecules together. (correct)
Cohesion refers to the pressure exerted by a fluid, while adhesion refers to fluid flow patterns.

Which of the following statements about the properties of gases compared to liquids is correct?

Gases flow more easily than liquids due to less intermolecular attraction. (correct)
Gases have a stronger cohesion than liquids.
Gases are incompressible, while liquids are compressible.
Gases have a definite volume while liquids do not.

What is viscosity primarily a measure of?

The buoyancy of the fluid.
The pressure within the fluid.
The fluid's resistance to flow. (correct)
The density of a fluid.

In terms of fluid dynamics, what is the primary difference between hydraulic and pneumatic systems?

Hydraulic systems use liquids for force transmission, while pneumatic systems use gases. (C) Signup and view all the answers

Which of the following best defines the term 'inputs' in a system?

The energy, force, or raw materials put into a system. (B) Signup and view all the answers

Which type of fluid flow is characterized by smooth and orderly motion?

Laminar flow (A) Signup and view all the answers

What characterizes the purpose or goal of a system?

It defines the outputs produced by the system. (A) Signup and view all the answers

Which example correctly illustrates a side effect of a system?

Dizziness from prolonged use of an iPad. (D) Signup and view all the answers

Which of the following statements correctly differentiates between inputs and outputs?

Inputs refer to the energy provided, whereas outputs pertain to the results achieved. (A) Signup and view all the answers

In the context of systems, which example best represents an output?

Learning results experienced in a classroom. (C) Signup and view all the answers

What distinguishes a physical system from a social system?

Physical systems perform tasks without human involvement. (C) Signup and view all the answers

Which of the following best describes subsystems?

Systems that operate within a larger overriding system. (C) Signup and view all the answers

What is a mechanism in the context of physical systems?

The mechanical components that work together to perform a task. (C) Signup and view all the answers

Which statement accurately defines automation in comparison to human labor?

Automation reduces the need for human intervention in tasks. (A) Signup and view all the answers

Which scenario best illustrates how systems evolve over time?

Adapting new communication methods based on technological advancements. (D) Signup and view all the answers

Which of the following illustrates the relationship between mechanical advantage (MA) and work?

Higher MA always results in less work required. (A) Signup and view all the answers

What is the primary purpose of using simple machines with different mechanical advantages?

To adjust the effort needed to lift loads efficiently. (D) Signup and view all the answers

What distinguishes ideal mechanical advantage from actual mechanical advantage?

Actual MA considers friction and other losses. (D) Signup and view all the answers

Flashcards

Cohesion

The attraction between molecules of the same substance, like water molecules sticking to each other.

Adhesion

The attraction between molecules of different substances, like water molecules sticking to glass.

Surface Tension

The force that causes a liquid's surface to act like a stretched membrane, due to cohesion between molecules.

Meniscus

The curved upper surface of a liquid in a container, caused by the balance between cohesive forces and adhesive forces.