IOne goes up the other goes up.. Frequency (ƒ) – number of wave cycles that pass in a point of given time 1/period How often something happens. Your heart.

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Presentation transcript:

IOne goes up the other goes up.

Frequency (ƒ) – number of wave cycles that pass in a point of given time 1/period How often something happens. Your heart rate is a frequency, measured as beats (cycles) per minute (time).

Hertz (Hz) Unit for Frequency is Hertz (Hz) – cycles per second

Hertz (Hz) – cycles per second/ how you measure frequency And this is one second If this is one wave What is each wave’s frequency?

1 year 3 months 6 months 9 months Period (T) – time required for one cycle – Or a complete motion that returns to its starting point How long is a class Period? The motion of the earth around the sun has a period of one year.

Velocity

Math Equations

Velocity of Waves Math Trick ÷ X

Wavelength of Waves Math Trick ÷ X PERIOD T

Finish: Math Practice – Speed and velocity used interchangeably—right now they mean the same thing – Stay in your seats until you are done – When you finish form a group of three, get a stamp and a slinky

Exit Question An earthquake has a speed of 4000 m/s and a frequency of 8 Hz. What is its wavelength? Wavelength = 500m