IPC Review

The period of a certain wave is 20 seconds. What is the frequency of this wave? 0.05 waves/sec 10 waves/sec It depends on the medium. It depends on the speed of the wave.

0.05 waves/sec

A wave travels 40 meters across a field of grass in 4 minutes. What is the speed of the wave? 0.17 m/s 10 m/s 240 m/s 320 m/s

0.17 m/s

How long would it take for a sound impulse to travel through an aluminum rod 1,500 meters long? 3.4 sec 0.29 sec 4.5 sec 0.45 sec

0.29 sec

An ocean wave has a wavelength of 2 meters and a period of 5 seconds. What is the speed of the wave? 0.4 m/s 2.5 m/s 10 m/s 50 m/s

0.4 m/s

A large boulder falls from an underwater ledge and crashes on the floor of the ocean. A pod of dolphins is 800 meters away. Determine how long it takes for the sound of the crash to reach the dolphins. 0.5 sec 0.3 sec 2.3 sec 1.9 sec

0.5 sec

Two tuning forks are played at the same time. One has a frequency of 490 Hz and the other is 488 Hz. How many beats per second are heard? 490 488 2 4

2

If the second harmonic of a certain string is 42 Hz, what is the fundamental frequency of the string? 21 Hz 42 Hz 84 Hz 126 Hz

21 Hz

A galloping pony speeds past you at 5 m/s. The frequency of the sound produced by the hooves on the dirt is 221 Hz. Assume the speed of sound to be 342 m/s. What is the observed frequency of the hooves after the pony has passed your position? 218 Hz 226 Hz 216 Hz 224 Hz

218 Hz

The siren from a small town fire station is heard at a location 3 kilometers away. If the air temperature is 20°C, at what velocity did the sound travel? 319 m/s 331 m/s 343 m/s 387 m/s

343 m/s

When a 440-Hz tuning fork and a piano key are struck together, five beats are heard. If the pitch of the note on the piano is lower than the tuning fork, what is the frequency of the note? 440 Hz 445 Hz 435 Hz 435 or 445 Hz

435 Hz

Wave X has an amplitude of 5 and wave Y has an amplitude of 4. What will happen when the crest of wave X meets the crest of wave Y? A crest with an amplitude of 1 will form. A trough with an amplitude of 1 will form. A crest with an amplitude of 9 will form. A trough with an amplitude of 9 will form.

A crest with an amplitude of 9 will form.

the apparent change in frequency perceived when the source of a sound and an observer are approaching or moving away from each other

Doppler effect

Which of the following corresponds to a supersonic speed? Mach 0.5 Mach 1.0 Mach 1.5

Mach 1.5

A pulse is a non-recurrent wave. True False

True

Mechanical waves require a medium for transmission. True False

True

The atmosphere can produce the same effects as a prism when the Sun is low in the sky. True False

True

The decibel scale is used to measure the perceived loudness of a sound. True False

True

Which of the following would use a convex lens? magnifying glass telescope microscope all of the above

all of the above

The loudness of a sound is related to the _____ of the sound wave. wavelength frequency velocity amplitude

amplitude

the maximum displacement of particles (positive or negative) during wave motion

amplitude

The data listed below are for mechanical waves. Which wave has the greatest energy? amplitude = 7 cm; wavelength = 12 cm; period = 14 seconds amplitude =12 cm; wavelength = 14 cm; period = 7 seconds amplitude = 14 cm; wavelength = 7 cm; period = 12 seconds

amplitude = 14 cm; wavelength = 7 cm; period = 12 seconds

a series of alternating reinforcements and cancellations produced by the interference of the waves of different frequencies

beats

White light shines on a piece of paper whose atoms are capable of absorbing orange, indigo, violet, yellow, red, blue, and green. What color is the paper? black white brown gray

black

An ocean wave is an example of a(n) _____ wave form. transverse longitudinal compression circular

circular

a wave in which wave energy causes both transverse and longitudinal motion, causing an overall circular pattern of particle movement

circular wave

a diverging lens, thinner in the middle than at the edges, which causes refracted rays to diverge, producing a virtual image

concave lens

a converging, or parabolic, mirror; reflected rays converge at the focal point

concave mirror

A concave mirror ______light, whereas a concave lens________ light.

converges diverges

A ______mirror will diverge light rays.

convex

Farsightedness is corrected with a_______ lens.

convex

a converging lens, thicker in the middle than at the edges, which causes refracted rays to converge at the focal point

convex lens

a diverging mirror that always produces a virtual image

convex mirror

The part of the eye responsible for most of the refraction of incoming light is the _____. lens retina optic nerve cornea

cornea

When two notes are played simultaneously, creating a discordant sound, it is called _____. acoustics consonance timbre dissonance

dissonance

Select all that apply. A concave lens _____. converges light bulges in the middle diverges light is thinner in the middle

diverges light is thinner in the middle

Which part of the ear picks up vibrations from the atmosphere? eardrum bones of the middle ear hair cells nerve from the inner ear

eardrum

the visible and invisible radiations emitted by objects

electromagnetic spectrum

waves in which electric and magnetic fields oscillate

electromagnetic waves

the number of oscillations that occur in a given time period

frequency

Mechanical waves travel slowest in which physical state? solid liquid gas There is no pattern based on physical state.

gas

multiples of the fundamental frequency that are produced by a musical instrument

harmonics

Bats use ultrasound in echolocation. This sound is characterized by _____. low frequency low amplitude high frequency high amplitude

high frequency

Increasing the pitch of a note on the piano means you make the note _____. higher lower louder softer

higher

the addition of the disturbances caused by two or more waves

interference

Which of the following are electromagnetic waves? sound waves water waves ground waves light waves

light waves

Select all that apply. Sound is a ____ wave. longitudinal transverse pressure circular

longitudinal pressure

wave in which the oscillations are in the same direction as the wave motion; sometimes called a compression wave

longitudinal wave

a perception of sound that relates to the amplitude of the sound wave

loudness

A sound-producing object is moving away from an observer. The sound the observer hears will have a frequency___________ that actually being produced by the object.

lower than

waves in which particles of a medium oscillate

mechanical waves

The frequency of a wave is the inverse of the wave's ________ .

period

the time required for one wavelength to pass

period

Which of the following terms describes the motion of particles during the transmission of wave energy? non-recurrent arbitrary periodic unpredictable

periodic

the highness or the lowness of a sound; measured in hertz

pitch

Sound waves have two parts. The part of the wave where the particles of the medium are spread apart is called the _____. rarefaction compression pitch amplitude

rarefaction

A shock wave first forms when an object______ the speed of sound.

reaches

The color that is bent the least by a prism is _____. violet blue yellow red

red

The atoms of blue paper _____ blue light. absorb reflect transmit

reflect

A fishing boat using sonar to locate fish is employing _____. diffraction reflection refraction interference

reflection

the change in the direction of a wave as it bounces off the boundary between two media

reflection

the change in the direction of a wave as it enters a new medium

refraction

the tendency of an object to vibrate at a maximum amplitude at specific frequencies

resonance

Sound travels fastest in _____. solids liquids cold gases warm gases

solids

The main factors that determine the speed of a wave in any particular medium are _____. density and temperature stiffness and density stiffness and size size and temperature

stiffness and density

Which of the following is an illuminated object? a lightbulb a fire the Sun the Moon

the Moon

The colors you see during a sunset are caused by _____. the refraction of light by the atmosphere the absorption of light by the atmosphere the reflection of light by the atmosphere

the refraction of light by the atmosphere

the characteristics by which the ear distinguishes between sounds with the same frequency and amplitude

timbre

wave in which the oscillations are at right angles to the direction of the wave movement

transverse wave

Which of the following types of electromagnetic radiation has the most energy? ultraviolet visible infrared They all have the same energy.

ultraviolet

An image formed by a concave lens is _______

virtual

An object is placed in front of a plane mirror. The image will be _______

virtual

A _________ is a disturbance that transmits______ .

wave energy