Sainsa Dasar - Mekanika Fluida

Multiple Choice

What is the main topic of the presentation?

• Mekanika Fluida

• Sains Dasar

• Fisika

• Kimia

Multiple Choice

What are the three main topics covered in this lesson?

• Tegangan Permukaan

• Kapilaritas

• Viskositas

• All of the above

Multiple Choice

What are the factors that allow a mosquito to float on water?

• Surface tension

• Weight of the mosquito

• Wind speed

• Water temperature

Multiple Choice

What is the tendency of liquids to become rigid, as illustrated in the image?

• Surface tension

• Viscosity

• Density

• Pressure

Multiple Choice

What is the phenomenon described by the term "tegang permukaan" in the context of fluids?

• Surface tension

• Fluid dynamics

• Viscosity

• Capillarity

Multiple Choice

What is the formula for surface tension (γ) as shown in the image?

• γ = F/L

• γ = W/A

• γ = F*L

• γ = L/F

Multiple Choice

What is the surface tension of water at 20 °C?

• 0.440 N/m

• 0.023 N/m

• 0.076 N/m

• 0.059 N/m

Open Ended

Bagaimana cara menurunkan tegangan permukaan?

Multiple Choice

What are the two types of interactions represented in the diagram related to capillarity?

• Kohesi

• Adhesi

• Interaksi Molekul

• Kapilaritas

Multiple Choice

What is the difference between gaya kohesi and gaya adhesi as illustrated in the image?

• Gaya kohesi is the force between similar molecules

• Gaya adhesi is the force between different molecules

• Gaya kohesi is stronger than gaya adhesi

• Gaya adhesi is weaker than gaya kohesi

Multiple Choice

What is the concept illustrated in the image regarding water molecules?

• Cohesion

• Adhesion

• Surface tension

• Density

Multiple Choice

What is the role of water molecules in the adhesion process as shown in the images?

• They repel ions

• They attract ions

• They dissolve salts

• They form bubbles

Multiple Choice

What is the formula for calculating the height of a liquid in a curved surface?

• h = 2y cos θ / ρgr

• h = ρg / 2y cos θ

• h = 2g / ρy cos θ

• h = ρy / 2g cos θ

Multiple Choice

What does the formula for capillarity represent?

• The height of fluid in a tube

• The pressure of a fluid

• The density of a fluid

• The temperature of a fluid

Open Ended

Mana Yang memiliki viskositas paling besar?

Multiple Choice

What is the formula for viscosity as shown in the image?

• F = ηA v/L

• F = m/a

• F = ma

• F = ρg

Multiple Choice

What is the viscosity coefficient of water at 20°C?

• 1.8 cPoise

• 1.0 cPoise

• 0.3 cPoise

• 0.018 cPoise

Multiple Choice

What is the formula for fluid flow rate in a circular tube according to Poiseuille's Law?

• Q = πr^4(P1 - P2)/(8ηL)

• Q = 8ηL/πr^4(P1 - P2)

• Q = (P1 - P2)/(r^4)

• Q = 8ηL/(πr^4(P1 - P2))

Multiple Choice

What is the difference between an ideal fluid and a viscous fluid according to Stokes' Law?

• Ideal fluid has constant speed

• Viscous fluid has constant speed

• Ideal fluid has varying speed

• Viscous fluid has no viscosity

Multiple Choice

What does Stokes' Law determine regarding viscosity?

• The density of fluids

• The coefficient of viscosity

• The speed of sound in fluids

• The pressure of fluids

Multiple Choice

What is the significance of expressing gratitude in a learning environment?

• It builds relationships

• It has no impact

• It is unnecessary

• It creates competition

Poll

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