Wave Properties and Sound Energy: Unit Review Set

What is frequency?

Frequency is the number of times a wave completes a cycle in one second, measured in Hertz (Hz).

How do the wavelengths of sound waves at different frequencies compare?

Waves with higher frequencies have shorter wavelengths, while waves with lower frequencies have longer wavelengths.

What is the relationship between amplitude and energy in ocean waves?

The energy (E) of an ocean wave is proportional to the square of its amplitude (A), represented by the equation E = A².

How does increasing wave height affect energy?

When the height of ocean waves increases, the energy carried by the waves increases exponentially, meaning a six-foot wave carries more energy than a two-foot wave.

What happens to sound waves when playing higher notes on a clarinet?

As higher notes are played, the frequency of the sound waves increases, resulting in shorter wavelengths.

Which sound has 1,000 times more energy than a dishwasher?

A jackhammer produces sound that has 1,000 times more energy than the sound of a dishwasher.

What type of wave is produced when tapping on a metal leg?

The tapping produces a longitudinal wave, as it travels through the metal.

Why is it harder to ride big waves than small waves?

Big waves carry more energy due to their larger amplitude, making them more powerful and difficult to ride.

What is the minimum frequency a human can hear?

Humans can hear frequencies as low as 21 Hz.

How do waves interact with matter?

Waves can be reflected, refracted, or absorbed when they encounter different materials.

What is the relationship between amplitude and energy?

The larger the amplitude of a wave, the more energy it carries.

What is required to produce sound?

To produce sound, an object must vibrate.

In which medium does sound travel fastest?

Sound travels fastest in solids compared to liquids and gases.

What is wavelength?

Wavelength is the distance between two consecutive points of a wave that are in phase, such as crest to crest or trough to trough.

How many wavelengths pass in 3 seconds at 21 Hz?

At 21 Hz, 63 wavelengths pass in 3 seconds (21 Hz x 3 seconds).

Mechanical Wave

A wave that needs matter to move through.

Wave Interaction

When waves meet objects, materials, or other waves.

Reflection

When a wave bounces back after hitting a surface.

Refraction

When a wave changes direction because it moves into a different material.

Absorption

When a material takes in wave energy instead of bouncing it back.

Transmission

When a wave passes through a material.

Interference

When two or more waves meet.

Constructive Interference

When waves combine to make a bigger/stronger wave.

Destructive Interference

When waves combine and become smaller or cancel out.

Medium

The material a wave travels through.

Energy Transfer

Waves move energy from one place to another.

Echo

A reflected sound wave.