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final exam Flashcards

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1
Q

pressure

A

force/area or densitygheight of a fluid

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2
Q

gauge pressure

A

total pressure minus atmospheric pressure

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3
Q

simple harmonic oscillator

A

undergoes simple harmonic motion due to a restoring force, F=-kx

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4
Q

amplitude

A

maximum displacement from equilibrium

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5
Q

cycle

A

one motion going out and returning to the starting position

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6
Q

period (T)

A

time required to complete one cycle

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7
Q

frequency

A

cycles per second in units hertz
f=1/T

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8
Q

period of oscillation for a mass on a spring

A

T=2pi square root of m/k

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9
Q

sinusoidal equation for oscillation

A

x(t)=Acos(2pift)

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10
Q

period of oscillation for a pendulum

A

T=2pi square root of l/g

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11
Q

energy of a simple harmonic oscillator

A

E=1/2mv^2+1/2kx^2=1/2kA^2

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12
Q

transverse waves

A

the oscillations are perpendicular to the direction a wave travels

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13
Q

longitudinal waves

A

the oscillations are parallel to the line of travel

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14
Q

wavelength

A

the distance between two successive crests ( λ)

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15
Q

speed of a wave

A

v= λf

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16
Q

intensity of a wave

A

energy per unit time carried across an area

17
Q

the principle of superposition

A

when two waves pass through the same region of space they interfere and the resulting displacement is the sum of their individual displacements

18
Q

constructive interference

A

the two waves are acting in phase and the resulting displacement is larger than the individuals

19
Q

destructive interference

A

the two waves are in opposite phase and the resulting displacement is less than the individuals

20
Q

standing waves

A

occur at certain frequencies when the ends of a wave are fixed at nodes

21
Q

node

A

point of destructive interference where no oscillation can occur

22
Q

antinode

A

points of constructive interference, maximum amplitude occurs

23
Q

formulas for wavelengths of standing waves in terms of the length of a stretched string

A

L= λ/2 n=1
L= λ n=2
L= λn/2 n>2

Physics (6 decks)

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