Properties of Waves.

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Presentation transcript:

Properties of Waves

COPY ON PAGE 16 IN SPIRAL JUMP ROPE LAB: WHAT WILL HAPPEN TO A WAVE IF WE INCREASE THE DISTURBANCE ? HYPOTHOSIS: ________________________________________________________________________________THEN________________________________________________.

COPY TABLE 1: LABEL “70% EFFORT” LINE (DRAW THE LINES) DOES THE WAVELENGTH (INCREASE/DECREASE) IS AMPLITUDE SIZE Increase/Decrease DOES FREQUENCY (INCREASE/ DECREASE) 1ST FROM 40CM TO 60CM 2ND FROM 20CM TO 80CM 3RD WHOLE METER

COPY TABLE 2 : LABEL AS “50 % EFFORT” LINE (DRAW THE LINES) DOES THE WAVELENGTH (INCREASE/DECREASE) IS AMPLITUDE SIZE Increase/Decrease DOES FREQUENCY (INCREASE/ DECREASE) 1ST FROM 40CM TO 60CM 2ND FROM 20CM TO 80CM 3RD WHOLE METER

COPY TABLE: LABEL AS “90% EFFORT’ LINE (DRAW THE LINES) DOES THE WAVELENGTH (INCREASE/DECREASE) IS AMPLITUDE SIZE Increase/Decrease DOES FREQUENCY (INCREASE/ DECREASE) 1ST FROM 40CM TO 60CM 2ND FROM 20CM TO 80CM 3RD WHOLE METER

COPY PAGE 17 CREATE A CLAIM BASED OFF YOUR DATA TABLE USING 3 PIECES OF EVIDENCE AND HYPOTHESES TO ANSWER THE FOLLOWING: HOW DOES THE DISTURBANCE IN THE MEDIUM AFFECT THE WAVELENGTH, AMPLITUDE, AND FREQUENCY ?

SUBMIT TO JUPITER TAKE A PICTURE OF ONE OF YOUR WAVES MADE IN LAB. OPEN THE PICTURE IN NOTABILITY AND IDENTIFY AND LABEL ALL THE PARTS OF THE WAVE. INCLUDE THE WAVES: -AMPLITUDE - WAVELENGTH -TROUGH - CREST - EQUILIBRIUM POINT -90 DEGREE ANGLE IN WAVE

What exactly is a wave? Wave: Any disturbance that can distribute and can transmit energy through matter or space. Matter meaning liquids, gases, or solids Other examples…. Radio waves Analog or HD digital TV signals Cellular reception Microwave ovens SONAR Light waves from the sun Crossfit ropes

Waves Carry Energy Medium: solid, liquid, or gas through which waves can travel Waves carry energy through the medium….not the medium carries the wave energy Waves do work on everything in its path…. Ex. Waves at the beach List 3 other examples

Types of Waves 3types Transverse Wave Particles in the medium wave vibrate up and down Transverse means moving across Ex…crossfit ropes Longitudinal Waves Particles in the medium vibrate back and forth Push on a spring Compression: portions are tighter than normal Rarefaction: particles are less crowded together

Amplitude Amplitude: maximum distance a wave vibrates from its rest position Rest position means neutral Larger the amplitude, the taller the wave is Larger Amplitude means more energy placed in to the wave.

Wavelength Wavelength: distance between 2 adjacent crests or compressions in a series of waves. Can also be measured on the trough of a wave

Frequency Frequency: Number of waves produced over a given time period Waves can be counted by the number of crests or troughs that pass a point over a certain amount of time. Directly related to a wave’s wavelength Expressed in hertz (Hz). 1 Hz = 1/s Higher frequency = more energy Longer wavelength = less energy

Energy Transfer without a Medium We are talking space We cannot hear sound in space, because it needs a medium Some waves travel MUCH faster in space Examples Light waves from the sun List 2 more

Wave Speed Velocity = Wavelength X Frequency Wave Speed: speed at which a wave travels Speed of a wave depends on medium it is traveling through Velocity = Wavelength X Frequency

WAVES AND MOVEMENT WHAT MAKES WAVES MOVE? IF WE SHAKE A JUMP ROPE SIDE TO SIDE ON THE GROUND WHAT ARE YOU PUTTING INTO IT? ARE WE DISTURBING THE ROPE? HOW CAN WE DISTURB THE ROPE MORE?

Review Please write down 3 things you learned today….