Are water waves mechanical or electromagnetic? Why?

• Mechanical, because they require a medium to propagate

• Electromagnetic, because they can travel through a vacuum

• Mechanical, because they are visible to the human eye

• Electromagnetic, because they decrease in amplitude over distance

What is the relationship between liquid pressure and its depth?

• Pressure increases with depth.

• Pressure remains the same at all depths.

• Pressure depends on the density of the liquid.

• Pressure is independent of depth.

What do logic gates do in digital circuits?

• Control current flow

• Perform logical operations on binary inputs

• Store data

• Amplify signals

What is Physics?

• The study of living organisms

• The study of matter and energy

• The study of ancient civilizations

• The study of languages

What do vectors and scalars have in common? How do they differ?

• Vectors and scalars both have magnitude and direction. They differ in that vectors have both, while scalars only have magnitude.

• Vectors and scalars both have magnitude. They differ in that vectors have magnitude only, while scalars have both magnitude and direction.

• Vectors and scalars both have direction. They differ in that vectors have direction only, while scalars have both magnitude and direction.

• Vectors and scalars both have magnitude. They differ in that vectors have both magnitude and direction, while scalars have magnitude only.

When should we use the polygon law of vector addition?

• When adding more than two vectors

• When adding two perpendicular vectors

• When adding two parallel vectors

• None of the above

What is the near point of a normal eye?

• 10 cm

• 15 cm

• 20 cm

• 25 cm

Which teaching method involves comparing an unknown concept with a known concept to bring about conceptual change in students?

• Concept maps

• Simulation

• Conceptual change text

• Analogy

What is the spontaneous emission of particles or radiation from unstable atomic nuclei called?

• Radiation therapy

• Nuclear decay

• Particle acceleration

• Nuclear fusion

What happens to the image on the screen if half of the convex lens is covered with a piece of card?

• The image is unaffected

• The image is distorted

• The image is enlarged

• The image disappears