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Lecture 2

PHYS 1041 Lecture Notes - Lecture 2: Transverse Wave, International System Of Units, Longitudinal Wave

4 pages74 viewsWinter 2014

Department
Physics
Course Code
PHYS 1041
Professor
Dr.David Fleming
Lecture
2

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Physics 1041 Notes
January 13th
Waves
wave: traveling disturbance that transmits energy through a medium
longitudinal wave: oscillations move in the same direction as the wave
propagation itself
transverse wave: oscillations move at a 90 degree angle to the wave propagation
standing wave: a driving process creating a wave pattern that appears to stay in
place
Important variables for waves
A = amplitude, the maximum value of wave disturbance away from the
equilibrium position (SI units of meters)
λ (lamda) = wavelength, distance over which a pattern repeats itself, i.e. from
max point to max point (SI units of meters)
T = period, time of one complete oscillation or wave pattern (SI units of seconds)
f = frequency, number of wave cycles that pass per unit time (SI units of Hertz)
v = velocity, speed of travel through a medium (SI units of meters per second)
F = force (SI units of newtons)
m = mass (SI units of kilograms)
g = acceleration due to gravity, equal to approximately 9.81m/s2
L = length of object, i.e. string (SI units of meters)
Important equations for waves:
T
f1
=
λ
fv
=
mgF
=
Lm
F
v/
=
Other important equations:
Percent error =
%100
×
B
BA
where A=measured value and B=theoretical value
Percent difference =
%100
)(
2
1
×
+
BA
BA
where A and B are two measured values
January 15th
Parameters of waves
λ= wavelength
v= speed of wave
f=frequency
all related by the equation
λ
fv
=