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Presentation transcript:

Physical Science Force Waves Physical Science Force

What is a Wave? A Wave is a _______________________ _________________________________. Waves like water waves or crowd waves travel through a medium. A medium is _______________________ ____________________. disturbance that carries energy through matter or space a material through which a waves transfers energy

Wave parts The distance between a point on one wave to the identical point on the next wave. λ Wavelength = ___ = _________________ __________________________________________________ Frequency = ___ = ______________________ ____________________________________ Velocity = ___ = ______________________ The number of identical wave points that pass a place per second. f The speed a wave travels. V V = λ x f

Types of Waves There are two types of waves: _______________ transverse compressional

Transverse Waves In transverse waves, the medium moves __________________________________ __________ at right angles to the direction the wave travels.

Transverse Characteristics Crest = ____________________ Trough = ____________________ Amplitude = _______________________ ______________ Highest point on a wave Lowest point on a wave Height of a wave from the rest position

Characteristics of Waves rest position crest wavelength amplitude trough

Compressional Waves In compressional waves, the medium ________________________________ _______________ moves in the same direction that the wave travels.

Compressional Characteristics Compressions = ____________________ _________________________________ _________ Rarefactions = _____________________ the crowded area in a wave where the medium is pushed together. Less dense area of a wave.

So…uhh…what does all this have to do with waves? In sound waves, the ___________ determines how loud the sound is and the ___________ determines the pitch of the sound. amplitude frequency High Amplitude  Loud sound High Frequency  High pitch sound

Resonance Every object has a certain ____________ ____________ that it prefers to vibrate at. When an object is vibrated at the natural frequency, the amplitude of vibration __________. This is called __________. natural frequency increases resonance

Examples of Sound Waves 300Hz 100Hz 400Hz 80Hz 500Hz 60Hz 800Hz 40Hz

Interference Interference is ______________________ _________________ There are two types of interference: ________________ when two waves combine to form a new wave. constructive destructive

Constructive Interference Constructive interference is ___________ _________________________________ ____________________________ when the compressions of different waves arrive at the same place at the same time

Destructive Interference Destructive interference is ____________ __________________________________ ________________________ when the compressions of one wave meet the rarefactions of another wave

What Interference sounds like? 400Hz and 401Hz 400Hz and 403Hz 400Hz and 405Hz 400Hz and 411Hz 400Hz and 450Hz