Post on 28-Aug-2018
1) Get your journals. Find the next
available page.
2) Complete the Warm-Up Exercise
for March 15th
3) Help pass back graded papers.
4) Time Limit: 7 minutes
D. Goldsberry 3/15/2012
D. Goldsberry 3/15/2012
Practice Sheet #24
is due tomorrow.
If you use your pass, staple
it to the sheet and fill in the
answers during class
review.
David Orekoya
Chloe Roberson
Janell Banks
Frank Rivera
Nick Valvis
Cameron Johnson
Allen Cooper
LaDaish Franklin
Brian Suggs
Julissa Pineda-Espinosa
Brendalyn Bleetan
Evan Sullivan
Jairo Roque
D. Goldsberry 3/15/2012
Kat Spearmon
Dwayne Watson
Emma Fiester
Ajani Kerr
Evelyn Chahuich
Yanitzie Cruz
Jessya Nelson
Lonniesca Boles
Juliana Lubin
Aaron Preston
Sha’nejah Smalls
Kaia Riley
D. Goldsberry 3/15/2012
Taylore Matthews
Bre’Shona Sellers
Kenton Pascoe
Alicia Ricks
Lesleigh Knotts
Deyana Saintdic
Morgan Brown
Amari Milhouse
Alexia Sellers
Brandon Gregory
D. Goldsberry 3/15/2012
Adrin Williams
Dominique Jones
Mikyla Carter
Irving Garcia
Zahria Holmes
Na’tia Shaw
Ja’Quan Hodges
Allissa Ruocchio
Alexus Martinez
Nicholus Young
D. Goldsberry 3/15/2012
S8P5: Students will
explore the wave nature
of sound and
electromagnetic radiation.
D. Goldsberry 3/15/2012
a. Identify the characteristics of
electromagnetic and mechanical
waves.
d. Describe how the behavior of waves is
affected by medium (such as air, water,
solids).
e. Relate the properties of sound to
everyday experiences.
f. Diagram the parts of the wave and
explain how the parts are affected by
changes in amplitude and pitch. D. Goldsberry 3/15/2012
Pitch is
The longer in vibrating object….
a) the lower the pitch
b) lower (or smaller) the frequency
c) bigger the wavelength of the sound
D. Goldsberry 3/15/2012
Pitch is
The shorter in vibrating object….
a) the higher the pitch
b) higher (or bigger) the frequency
c) smaller the wavelength of the sound
Wavelength and frequency have an
inverse relationship!
D. Goldsberry 3/15/2012
Wavelength and
frequency have an
inverse relationship.
When one gets bigger,
the other gets smaller.
D. Goldsberry 3/15/2012
How can sound be
destructive?
http://www.archive.org/details/SF121
D. Goldsberry 3/15/2012
Natural Frequency
For example, if a guitar string
(fastened at its end on a guitar) is
plucked, the waves created vibrate
at the string’s natural frequency.
D. Goldsberry 3/15/2012
Natural Frequency
If you change the length of the
string, you will also change its
natural frequency.
Demo-- Singing Rods
D. Goldsberry 3/15/2012
Resonance A phenomenon called resonance is
very important in physics because it
occurs in many mechanical and
electrical systems.
D. Goldsberry 3/15/2012
Resonance
Resonance is the transfer of
energy from one system to
another that vibrates at the same
frequency (its natural frequency).
D. Goldsberry 3/15/2012
http://www.regentsprep.org/Regents/physics/phys04/bresonan/default.htm
http://www.acoustics.salford.ac.uk/feschools/waves/wine2video.htm
http://www.acoustics.salford.ac.uk/feschools/waves/wine1video.htm
D. Goldsberry 3/15/2012
D. Goldsberry 3/15/2012
Practice Sheet #24
is due tomorrow.
If you use your pass, staple
it to the sheet and fill in the
answers during class
review.