waves
DESCRIPTION
Tsunami info from NOAA http://www.pmel.noaa.gov/tsunami/indo_1204.html http://www.youtube.com/watch?v=BvbBgh9ux6A Japan 2011. Waves. Homework http://www.atmosedu.com/202Physics/wavesearthactivity.html. Systems with a stable equilibrium point often exhibit Oscillations. - PowerPoint PPT PresentationTRANSCRIPT
WavesTsunami info from NOAA http://www.pmel.noaa.gov/tsunami/indo_1204.html
http://www.youtube.com/watch?v=BvbBgh9ux6A Japan 2011Homework
http://www.atmosedu.com/202Physics/wavesearthactivity.html
Systems with a stable equilibrium point often exhibit Oscillations
B is a stable equilibrium point because1)When the ball is pushed to the right from B the force of gravity acts to pull it back to B2)And when the ball is pushed to the left from B the force of gravity acts to pull it back to B
The Period of an Oscillating system is the time it takes to complete one full cycle
The period is the time it takes to go from A over to C and back to A.
The frequency of an Oscillating system is the number of cycle per second and is just
1/Period
Period
1frequency
The frequency unit of cycles per sec (1/s) has the special name Hertz (Hz)
The frequency of an Oscillating system is the number of cycle per second Period
1frequency
The frequency unit of cycles per sec (1/s) has the special name Hertz (Hz)
What is the frequency of vibration for a humming bird’s wings that has a period of 0.02 second?
The frequency of an Oscillating system is the number of cycle per second
Hz 50s .02
1
Period
1frequency
The frequency unit of cycles per sec (1/s) has the special name Hertz (Hz)
What is the frequency of vibration for a humming bird’s wings that has a period of 0.02 second?
Since the frequency of an Oscillating system is the number of cycle per second, the period
(number of seconds per cycle) is:
frequency
1Period
A seismic signal has a frequency of 0.2 Hz. What is the period of this signal?
Since the frequency of an Oscillating system is the number of cycle per second, the period
(number of seconds per cycle) is:
s 0.5Hz .2
1
frequency
1Period
A seismic signal has a frequency of 0.2 Hz. What is the period of this signal?
Period
Period
λf v
frequenc wavelengthspeed
period
1frequency
T
λ
period
wavelengthspeed
y
Longitudinal wave (like sound, or P-waves through Earth)
Transverse waves (like water waves, light, S-waves through Earth)
Constructive interferance Destructive Interferance
Standing Waves (Interferance pattern that results when a wave traveling to the right interfers with an identical wave traveling to the left.