Quarter 2 Review

What is energy?

• The ability to create matter

• The ability to do work

• The ability to produce sound

• The ability to reflect light

Answer explanation

Energy is defined as the ability to do work. It encompasses various forms, such as kinetic, potential, thermal, and more, all of which can perform work in physical systems.

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What role does energy play in wave generation?

• It stops the wave.

• It forces the matter to vibrate.

• It cools down the medium.

• It changes the color of the wave.

Answer explanation

Energy is essential for wave generation as it causes particles in a medium to vibrate. This vibration creates disturbances that propagate as waves, making 'It forces the matter to vibrate' the correct choice.

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Which wave can travel through empty space?

• Sound waves

• Water waves

• X-rays

• Seismic waves

Answer explanation

X-rays are electromagnetic waves that can travel through empty space, unlike sound waves, water waves, and seismic waves, which require a medium to propagate.

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Which electromagnetic wave is used in remote controls?

• X-rays

• Infrared

• Ultraviolet

• Gamma rays

Answer explanation

Remote controls use infrared waves to transmit signals. Infrared light is not visible to the human eye but can be detected by sensors in devices, making it ideal for remote communication.

What is the medium through which mechanical waves travel?

• Vacuum

• Solid, liquid, or gas

• Only solid

• Only liquid

Answer explanation

Mechanical waves require a medium to travel, which can be a solid, liquid, or gas. They cannot travel through a vacuum, making 'Solid, liquid, or gas' the correct choice.

Tags

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What is the direction of particle movement in a longitudinal wave?

• Perpendicular to wave direction

• Parallel to wave direction

• Circular motion

• Random motion

Answer explanation

In a longitudinal wave, particles move back and forth in the same direction as the wave travels. Therefore, the correct answer is 'Parallel to wave direction', as this describes the particle movement accurately.

Which type of wave is associated with light?

• Transverse

• Longitudinal

• Sound

• Mechanical

Answer explanation

Light is associated with transverse waves, where the oscillations are perpendicular to the direction of wave travel. In contrast, longitudinal waves, like sound, have oscillations parallel to the direction of travel.

Tags

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In a transverse wave, how do the particles move relative to the wave direction?

• Perpendicular

• Parallel

• Circular

• Random

Answer explanation

In a transverse wave, particles move perpendicular to the direction of wave propagation. This means as the wave travels forward, the particles oscillate up and down, creating the characteristic wave shape.

Tags

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Which wave type is shown with a hand compressing and releasing a slinky?

• Longitudinal

• Transverse

• Circular

• Elliptical

Answer explanation

The wave type shown with a hand compressing and releasing a slinky is longitudinal. In this type of wave, the particles of the medium move parallel to the direction of the wave, creating compressions and rarefactions.

What is the rest position in a transverse wave?

• Where the medium shows maximum disturbance

• Where the medium shows no disturbance

• Where the medium shows minimum disturbance

• Where the medium is at its highest point

Answer explanation

The rest position in a transverse wave is where the medium shows no disturbance. This is the equilibrium state of the medium before any wave energy is applied, contrasting with points of maximum disturbance.