physical science

The measure of the number of cycles per second is called what?

frequency

what is amplitude related too?

the amount of energy carried by the wave and the maximum displacement from the rest position

When a slinky strikes a fixed point, it behaves like a basketball hitting a backboard and bounces back. This wave behavior is called what?

reflection

A pendulum makes one complete swing over and back in 2.2 seconds. Its frequency is whart?

0.45 hertz

Which type of mechanical wave needs a source of energy to produce it?

a transverse wave, a surface wave, and a longitudinal wave

Part of a longitudinal wave where the particles are spread apart is called is called what?

refraction

A transverse wave does what?

oscillates (vibrates) perpendicular to the direction of wave travel

A section of a longitudinal wave where the particles are crowded together is called a what?

compression

If the amplitude or angle of a pendulum increases, the period of the pendulum does what?

stays the about the same

An example of a mechanical wave is a what?

ocean wave

Waves are affected by boundaries. When a wave front meets a certain boundary, all of the following may occur EXCEPT a change in what?

of frequency

Which type of wave needs a solid, liquid, or gas medium to transfer it?

a mechanical wave

When a wave bends as it crosses a boundary, what occurs?

refraction

A wave can make a leaf bob up and down on the water, but it cannot move the leaf toward the shore. This is because waves only transfer what?

energy

Sound waves are what?

longitudinal waves

An insect moves its wings up and down 144 times in three seconds. The period of this movement is what?

0.0208 seconds

The amount of time required for one cycle to occur is called the what?

period

What never changes in a wave at a boundary?

the frequency

When waves spread out after going through a gap or bend around the edge of a barrier then what occurs?

diffraction

Which factors have mininal effects on the period of a pendulum?

Mass and angle/amplitude of the pendulum

Which of these waves do NOT require a medium?

radio waves

In refraction, when two parts of a wave travel through different mediums, the parts move how?

at different speeds

A longitudinal wave does what?

vibrates/oscillates in the same direction as the direction of wave travel

The wavelength of a wave is 2.0m.  If the speed of the wave is 120 meters per second, the frequency of this wave is what?

60 Hz

If the length of a pendulum increases, the period of the pendulum does what?

increases

A substance through which a wave can travel is a what?

medium

The wavelength of a transverse wave is defined as what?

distance between corresponding points of two consecutive waves

The wavelength of a transverse wave is defined as what?

the distance from crest to crest and the distance from trough to trough

What is the only factor that affects the speed of sound waves?

the nature of the medium

What about sound is NOT true?

Air particles travel with sound waves

Musicians may tune their instruments to match another instrument that is in tune by using what?

beats

Two large waves on the ocean come together on the ocean’s surface to cancel each other out. The interaction responsible for this is called what?

destructive interference

A decibel is a unit used to measure what?

loudness of sound

When does the frequency of a wave change?

at the source and during the doppler effect

We often hear beats (rapid alternations between loudness and silence) when what?

two notes played at the same time have nearly the same frequency

Which sound has the highest pitch?

one with 156 Hz

A violin string vibrates at a fundamental frequency of 300 Hz. The frequency of the second harmonic for this string is what?

600 hertz

Large horns such as tubas produce sounds with long wavelengths while flutes produce sounds with short wavelengths because why?

the wavelength of sound produced is directly proportional to the size of the instrument

Two large waves on the ocean come together on the ocean’s surface to form a gigantic wave. The interaction responsible for this is called what?

constructive interference

The frequency of a sound wave determines what?

the pitch of the sound

What does the medium through which sound waves travel affect?

amplitude of the waves, speed of the sound, and wavelength

One thing you can do to protect your hearing is to what?

turn down the volume on a radio, sit in the back of the room during a rock concert, and wear earplugs

An echo is most likely to result when sound hits a surface that is what?

smooth and hard

What is true of the speed of sound waves?

Sound waves travel faster in solids like copper than in gases like air

You are standing still.  When a sound source approaches you, before it passes you, the pitch you hear is what?

higher

Ability to hear may be affected by what?

loud sounds, high frequency sounds, and age

What person will experience what happens to sounds due to the Doppler effect?

a father pushing a laughing toddler on a swing

The motion of either the listener or the source of a sound causes what?

the Doppler effect

Sonar equipment sends sound waves into deep water and measures what?

the time delay of the returning echoes

You are standing still.  When a sound source passes you and drives away the pitch you hear is what?

lower

What does the amplitude of a sound’s waves affect?

loudness

Dwayne’s violin is playing out of tune. Most of the notes are too low. What should he do?

shorten the strings