wave speed Flashcards

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1
Q

y

A

displacement (m)

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2
Q

A

A

amplitude (m)

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3
Q

x

A

postion (m)

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4
Q

λ

A

wavelength (m)

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5
Q

f

A

frequency (hz)

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6
Q

φ

A

phase(radians)

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7
Q

v=λf
λ/T, T is period

A

wave speed

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8
Q

c = 3 x 10 to the 8 [m/s]

A

EM waves

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9
Q

four sound ways in a fluid (water or air) the speed is determined by v=(B/p) to the 1/2

A

bulk modulus (volumetric)
B is bulk
p is density kilograms per cubic meter

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10
Q

for longitudinal (sound) waves traveling down a thin rod the speed is determined by v=(Y/p) to the 1/2

A

Young’s modulus (tensile)
Y is young
p is kg per meter cubed

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11
Q

for transerve waves in a solid (earthquake S-waves) the speed is determined by v=(G/p) to the 1/2

A

shear modulus (shear)
g is shear
p is denstiy kg per metter cubed

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12
Q

What sets λ and Τ for a wave?

A

These are ultimately determined by the material properties of the medium.

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13
Q

Note that λ and Τ are constant parameters of a given wave just like Α,
even though displacement varies with

A

x and t

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14
Q

for waves on a string the speed is dtermined by v=)T/yu? to the 1/2

A

tension
t is tension in strong in newtons

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