MCAT Physics and Math 7: Equations to Remember Test and Flashcards

Wave speed

ν = fλ

Period

Angular frequency

Speed of sound

<p><em>B</em> is the bulk modulus</p><p><em>ρ</em> is the density of the medium</p>

B is the bulk modulus

ρ is the density of the medium

Doppler effect

<p><em>f′</em> is the perceived frequency</p><p><em>f</em> is the actual emitted frequency</p><p><em>ν</em> is the speed of sound in the medium</p><p><em>ν</em><sub>D</sub> is the speed of the detector</p><p><em>ν</em><sub>S</sub> is the speed of the source</p><p></p><p>The upper sign should be used when the detector or source is moving <em>toward</em> the other object. The lower sign should be used when the detector or source is moving <em>away</em> from the other object.</p>

f′ is the perceived frequency

f is the actual emitted frequency

ν is the speed of sound in the medium

ν_D is the speed of the detector

ν_S is the speed of the source

The upper sign should be used when the detector or source is moving toward the other object. The lower sign should be used when the detector or source is moving away from the other object.

Intensity

P is the power

A is the area

Sound level

<p>I<sub>0</sub> = 1 x 10<sup>-12</sup> W/m<sup>2</sup></p>

I₀ = 1 x 10^-12 W/m²

Change in sound level

I₀ = 1 x 10^-12 W/m²

Beat frequency

Wavelength of a standing wave (strings and open pipes)

L is the length of the string/pipe

n = 1, 2, 3 ...

Frequency of a standing wave (strings and open pipes)

L is the length of the string/pipe

n = 1, 2, 3 ...

Wavelength of a standing wave (closed pipes)

L is the length of the pipe

n = 1, 3, 5 ...

Frequency of a standing wave (closed pipes)

L is the length of the pipe

n = 1, 3, 5 ...

Flashcards: MCAT Physics and Math 7: Equations to Remember