Waves 1 Wave a disturbance that transfers energy
Waves 1) Wave - a disturbance that transfers energy from place to place. 2) Energy – ability to do work 3) Medium – The material through which a mechanical wave travels. Examples: gas, liquid, solid 4) Mechanical Waves – waves that require a medium through which to travel.
Mechanical Waves Two Types of Mechanical Waves 1) Transverse Waves - waves that move the medium at right angles to the direction on which the waves travel. Example: rope Parts of Transverse Waves Crest – high part of a transverse wave Trough – low part of a transverse wave.
Mechanical Waves 2) Longitudinal Waves – move the medium parallel to the direction in which the waves travel. Example: Slinky Parts of Longitudinal Waves Compressions – parts of the coil that are close together. Rarefactions- parts of the coil that are spread out.
What causes Waves? Mechanical waves are produced when a source of energy causes a medium to vibrate.
Properties of Waves Amplitude – is the maximum distance that the particles of the medium carrying the wave move away from their rest position. The more energy the higher the amplitude. Transverse Waves- Maximum distance the medium moves up (crest) or down(trough) from its resting position. Longitudinal Waves – The measure of how compressed or rarefied the medium becomes.
Properties of Waves Wavelength – the distance between two corresponding parts of a wave. Transverse Waves – measuring the distance from crest to crest or trough to trough. Longitudinal Waves – The distance between compressions.
Properties of Waves Frequency – is the number of complete waves that pass a given point in a certain amount of time. Frequency is measured in hertz (Hz).
Let’s Practice Frequency 1. 2 hertz 3 3 hertz 2. 5 hertz 4. 3. 5 hertz
Mathematical Formulas Speed – is how far the wave travels in a given length of time, or its distance divided by the time it took to travel that distance. speed = wavelength x frequency
Watch these Cool Videos on Waves Introduction to what a Wave is • https: //www. youtube. com/watch? v=RVy. Hk. V 3 w. Iyk Waves (2: 51) https: //www. youtube. com/watch? v=7 c. DAYFT Xq 3 E quick 24 second video on long + transverse waves
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