Types of Waves

What is the direction of oscillations in longitudinal waves?

At an angle to the direction of wave travel
Opposite to the direction of wave travel
Along the direction of wave travel (correct)
Perpendicular to the direction of wave travel

What is the amplitude of a wave?

The maximum displacement of the wave from the equilibrium position (correct)
The wavelength of the wave
The distance between successive peaks
The frequency of the wave

What is the wavelength of a wave?

The frequency of the wave
The maximum displacement of the wave from the equilibrium position
The distance between successive 'like' points on a wave (correct)
The distance between successive peaks

Which type of wave has oscillations perpendicular to the direction of wave travel?

Transverse wave (C) Signup and view all the answers

What is a common example of a longitudinal wave?

Sound wave (B) Signup and view all the answers

What is the definition of a wave?

A disturbance that propagates from one place to another (A) Signup and view all the answers

What is the main characteristic of sound intensity?

The amount of energy that passes through a given area in a given time (C) Signup and view all the answers

What is the SI unit of sound intensity?

Watt per meter squared (A) Signup and view all the answers

How does sound intensity from a point source change with distance?

It decreases as the square of the distance (D) Signup and view all the answers

What is the application of sound intensity in biology?

Echolocation in bats (A) Signup and view all the answers

What is the principle behind sonar?

Underwater reflection of sound waves (A) Signup and view all the answers

What is the term used to describe the process of sound waves being sent and reflected through water?

Underwater echolocation (A) Signup and view all the answers

What is the change in pitch of a sound when the source and observer are moving relative to each other?

The Doppler effect (B) Signup and view all the answers

What is the unit of sound intensity level?

Decibel (dB) (A) Signup and view all the answers

How much does the intensity of a sound increase with each increase in intensity level of 10 dB?

It doubles (B) Signup and view all the answers

What is the relationship between the intensity of a sound and how loud it seems?

A sound that seems twice as loud is ten times more intense (B) Signup and view all the answers

What is the faintest sound that can be heard?

Threshold of human hearing (D) Signup and view all the answers

What is the relationship between a bel and a decibel?

A decibel is a tenth of a bel (A) Signup and view all the answers

What happens when the source moves faster than the speed of sound?

A sonic boom is created (D) Signup and view all the answers

What is the Doppler effect used for in medical diagnostics?

To evaluate blood velocity (D) Signup and view all the answers

What is the frequency range of ultrasound waves?

Above 20 KHz (C) Signup and view all the answers

What is the purpose of Doppler imaging?

To visualize velocities of moving tissues (B) Signup and view all the answers

What is shown in a Doppler echocardiogram?

The direction of blood flow with different colors (C) Signup and view all the answers

What is the Doppler effect used for in weather radar?

To track storm movement (C) Signup and view all the answers

What determines the fundamental frequency of a string on a musical instrument?

The length and/or linear density of the string (D) Signup and view all the answers

Why do guitar strings have different fundamental frequencies?

Because they have different densities (D) Signup and view all the answers

What is varied in a piano to produce different frequencies?

The length and density of the strings (D) Signup and view all the answers

How are individual strings tuned to exact frequencies?

By changing the tension of the string (B) Signup and view all the answers

Why is it desirable to have small variations in tension between strings in a musical instrument?

To prevent warping and other damage (C) Signup and view all the answers

What is the characteristic shape of a grand piano's sound box due to?

The variation in length and density of the strings (C) Signup and view all the answers