CH+5+sec+2

Waves are in both springs as well as in the ocean.
 * What do you see?**

**What do you think?** Water moves to make a wave when two currents are pushed together and the particles are moved upwards

o Symbol: l   · Wave Speed= (total distance)/(total time) o v= l ƒ § Used when you know the wave length and frequency · Medium: substance that carries waves o Transverse=perpendicular · Wave- regular and repeating pulses
 * Physics Chapter 5 section 2 vocabulary**
 * Crest- position of maximum amplitude
 * Trough- position of minimum amplitude
 * Amplitude-represents the amount of energy a wave has (distance)
 * Frequency (f)- how often a wave passes a point in one second
 * Higher: more frequently
 * Lower: less frequently
 * Measured in Hertz (Hz)
 * Period (T)- how many seconds it takes for one wave to pass
 * Measured in Seconds
 * Reciprocal of Frequency
 * Wave length- Distance from one point on a wave from the same point on the next wave
 * Transverse waves: move side to side and make a sin wave
 * Longitudinal wave: energy is in the same direction as particle motion
 * Pulse- one single disturbance; doesn’t repeat

SuperPosition Principle
 * Water particles move UP and DOWN
 * When two waves meet...
 * Crest and Crest: ADD
 * Crest and Trough: SUBTRACT

Physics Plus

a) amplitude= 4m b) period= 10/2= 5s c) frequency= 2/10=.2Hz d) wave length= 8m d) wave speed= 8*.2=1.6m/s


 * Physics Talk**
 * A wave is a transfer of energy with no net transfer of mass
 * Periodic Wave: a repetitive series of pulses
 * a wave sequence in which the particles of the medium undergo periodic motion
 * [[image:Screen_shot_2011-05-16_at_9.19.39_AM.png]]
 * [[image:Screen_shot_2011-05-16_at_9.19.44_AM.png]]
 * LOOK AT DEFINITIONS ABOVE

1. A wave is a transfer of energy 2. The difference between a transverse wave and a longitudinal wave is that the energy in a transverse wave is perpendicular to motion while longitudinal waves have energy parallel to motion. 3. A node is a point on a wave where the medium is motion less while and antinode is a point on a wave where the displacement is the largest.
 * Checking Up**

1 a. b. > > > c. Amplitude related to wavelength and speed
 * PTG**
 * amplitude: distance of motion left to right
 * wavelength= Amplitude*2
 * frequency=1, we only made one wave
 * speed= d/t
 * amplitude: m
 * wavelength= m
 * frequency= Hz
 * speed= m/s

2 a. The frequency will increase as well as the speed b. The speed c. The amplitude and wave length

3. You measure the distance from one point on one wave to the same point on the next wave

4. How many times the spring reaches point in one second

5. a. m b. Hz c. m/s d. v=f(wave length) e. Frequency times wave length is speed

6. a. A standing wave is a wave that remains in a constant position b. c. Wave length increases when who crests or troughs meet

7. a.Transverse waves move side to side and compressional waves move forwards and backwards b. It either moves side to side or back and forth c. When the wave bounced backwards

8. a. You don't shake it as far b. Move it farther

9. a. b.

10. 11. 12. 13.

Water moves up and down to make a wave. The water acts as the string and the current acts as the wave. When two currents meet, they form tall waves that topple over rather then bob up and down due to its high amplitude.
 * What do you think now?**