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Dragon > Quicksheets > Flashcards

Quicksheets Flashcards

1
Q

Mean is the ______ of the data points, and is heavily impacted by o______.

A

average, outliers

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2
Q

Median is the ______ of the data set, and is not affected by ______.

A

central value, outliers

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3
Q

Mode is the _____ of the data set.

A

most common data point(s)

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4
Q

Standard deviation is a measure of how ______ values are from the _____.

A

spread out, mean

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5
Q

For independent events, P(A and B) = __ x __

A

P(A) x P(B)

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6
Q

For independent events, P(A or B) =

A

P(A) + P(B) - [P(A) x P(B)]

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7
Q

null hypothesis states ________

A

hypothesis that there is no relationship between measured phenomena

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8
Q

p-value is the probability that the results were obtained _______, given that _______

A

the probability that the results were obtained by change, given that the null hypothesis is true

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9
Q

Confidence interval is the range of values ___________, within a given level of _______

A

believed to contain the true value, probability

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10
Q

Hawthorne effect: behavior is modified in response to the awareness of ______

A

being observed

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11
Q

Confounder: a variable that relates to _______ is ______.

A

the independent and dependent variables, overlooked

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12
Q

To estimate the product, if you round one number up, ___

A

round the other down

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13
Q

To estimate the quotient, if you round one number up,

A

round the other up

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14
Q

When you take the sq root of a number to an exponent, _____ the exponent

A

divide the exponent by two (it is to the power of 1/2)

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15
Q

7^2, 8^2, 9^2, 10^2

A

49, 64, 81, 100

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16
Q

11^2, 12^2, 13^2, 14^2, 15^2

A

121, 144, 169, 196, 225

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17
Q

16^2, 17^2

A

256, 289

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18
Q

18^2, 19^2

A

324, 361

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19
Q

log (AB) =

A

logA + logB

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20
Q

log (A/B) =

A

logA - logB

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21
Q

logA^B =

A

BlogA

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22
Q

log(1/A) =

A

-logA

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23
Q

logx = ____/____

A

lnx/2.303

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24
Q

log(n x 10^m) ~

A

m + 0.n

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25
Q

Triangle: 1,2,rad3 has angles

A

rad3 opposite 60
2 opposite 90
1 opposite 30

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26
Q

45, 45, 90 has sides

A

1, 1, rad 2

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27
Q

radical 3 is about

A

1.7

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28
Q

radical 2 is about

A

1.4

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29
Q

The energy of a photon is equal to Planck’ constant times ____, and and equivalent statement is ___

A

=hf

=hc/lambda

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30
Q

The maximum kinetic energy of an ejected electron is equal to _____ minus ______

A

hf - W

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31
Q

Mass defect is the difference between the _________ and the __________. The mass defect results from the conversion of matter to energy, embodied in the equation E=mc^2. This energy holds the nucleons within the nucleus and is called the ______.

A

sum of the masses of the nucleons in the nucleus, mass of the nucleus
binding energy

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32
Q

Alpha decay is the ejection of ____

A

Helium

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33
Q

In beta minus decay, a _____ is converted to a ______, and _____ is ejected.

A

neutron converted to a proton, electron is ejected

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34
Q

In beta plus decay, a _____ is converted to a _______, and ______ is ejected.

A

proton converted to a neutron, positron is ejected

35
Q

In electron capture, an electron is absorbed, and a ______ becomes a _____

A

proton becomes a neutron

36
Q

The index of refraction of a given medium is equal to the speed of light _______

A

divided by the speed of light in that medium

37
Q

According to Snell’s law, when light passes from one medium to another, the index of refraction of one medium _________ is equal to __________.

A

times the sin of the angle made by the passing light with the normal is equal to n2sin(theta)2

38
Q

If light enters from medium 1 into 2, and n2>n1, light will bend _____ the normal

A

toward

39
Q

To find dark fringes when a wave is diffracted, multiple the length of the ______ by the sin of the _________ to get n times the ________, where n = _________

A

slit, angle between line drawn to dark fringe and line parallel to direction of propagation, wavelength, 1,2,3…

40
Q

Inversion o __ inversion ___ = inversion __ = ___

A

+ inversion i
= inversion f
= 2/r

41
Q

If an object is placed inside the focal length of a _____ mirror, the image formed is behind the mirror, enlarged, and virtual.

A

concave

42
Q

Regardless of the position of the object, a convex mirror forms only a ______, _____ image.

A

virtual, upright

43
Q

The optics equation for a thin spherical lens is inverse ___ = inverse ____ + inverse _____

A

1/f = 1/i + 1/o

44
Q

For a converging lens, an object beyond the focal length is r____ and i_____.

A

real and inverted

45
Q

For an object inside the focal length of a converging lens, the image formed is v____, u_____, and e_____.

A

virtual, upright, enlarged

46
Q

No image is seen through a converging lens if the object is at the ____

A

focal length

47
Q

Inverted images have a _____ m

A

negative

48
Q

if the absolute value of m is less than 1, the image is ____

A

reduced

49
Q

if the absolute value of m is equal to 1, the image is ___

A

the same size

50
Q

m is equal to the _____ of ____

A

negative of i/o

51
Q

the speed of light is ____

A

3x10^8 m/s

52
Q

Sound propagates through a _____ medium by the oscillation of particles _______ the direction of the wave’s propagation.

A

deformable, parallel

53
Q

The intensity of sound is equal to its ________ _______ by ________

A

power/area

54
Q

An increase of 10 decibals means the intensity increased by

A

x10

55
Q

An increase of 20 decibals means the intensity increases by

A

x100

56
Q

Sound level = 10 x the ______ of ______

A

log of I/Io

57
Q

The perceived frequency is equal to the actual frequency multiplied by the velocity of the sound +/- the velocity of the _____ divided by the velocity of the sound +/i the velocity of the ______

A

detector, source

58
Q

If the observer and detector are getting closer, a _____ sign is found in the numerator. The opposite is true if the observer and detector are moving apart. Always, the sign in the denominator is ______ that in the numerator.

A

positive, negative, opposite

59
Q

A transverse wave is like ___ and a longitudinal wave is like ______.

A

the sea, a slinky

60
Q

The frequency of a wave relates to its period as ___

A

its inverse

61
Q

The velocity of a wave is equal to ___ times __

A

v= f x lambda

62
Q

Standing waves occur in _____, and pipes, ____ or ____

A

strings, open or closed

63
Q

For a standing wave on a string, its wavelength is equal to ____ the ____ divided by n=______. The ends are of the strings are always ______.

A

For a standing wave on a string, its wavelength is equal to twice the string’s length divided by n= 1,2,3….The ends are of the strings are always nodes.

64
Q

Open ends of pipes are always _____.

A

antinodes

65
Q

The wavelength of a standing wave within an open pipe is equal to ______. The formula is the same of a standing wave in a ___.

A

2L/n

string

66
Q

For a standing wave in a closed pipe, the wavelength equals the length of the pipe times ______, divided by n = _______.

A

4

1,3,5…

67
Q

Current flows from _____ to ______ potential.

A

high to low

68
Q

Current is equal to _________ per unit time. It can be expressed by the formula _______. The unit is _____, which is __ per ___.

A

how much charge passes a given point
I = Q/t
Amperes
Coulombs/second

69
Q

Ohm’s law can be applied to two things: an individual resistor or ______.

A

an entire circuit

70
Q

Voltage equals ___ x ___

A

current x resistance

V = IR

71
Q

An increase in temperature, has this effect on resistance

A

increases

72
Q

resistance is equal to the ______ of the resistor times its ____ivity, divided by its ____

A

length, resistivity, area

73
Q

In series, _____ gets split. In parallel, ____ gets split.

A

In series, voltage drops get split. In parallel, current gets split.

74
Q

Reciprocal resistance for circuits in _________. Reciprocal capacitance for circuits in _____.

A

Reciprocal resistance for circuits in parallel. Reciprocal capacitance for circuits in series.

75
Q

Around a closed loop circuit, the sum of ____ sources equals the sum of ____ around a closed loop.

A

Around a closed loop circuit, the sum of voltage sources equals the sum of voltage drops around a closed loop.

76
Q

At any junction, incoming _____ is equal to outgoing.

A

At any junction, incoming current is equal to outgoing.

77
Q

Capacitance is the ability to store charge per unit ____, so the formula is _____

A

voltage, C = Q/V

78
Q

The energy stored by a capacitor is equal to half of ____ times _____, which is equiv to half of ____^2/_____.

A 
U = 1/2QV
U = 1/2Q^2/C
79
Q

formal charge is equal to the valence _____ sticks _____ dots

A

minus, minus

80
Q

The force of attraction between two particles is equal to

A

kQq/r^2

81
Q

sin 0,30,45,60,90

A

0, 1/2, 1/rad2 ,1/rad3, 1

82
Q

cos 0,30,45,60,90

A

1, (rad3)/2, (rad2)/2, 1/2, 0

83
Q

tan 0,30,45,60,90

A

0, (rad3)/3, 1, rad3, undefined

Dragon (23 decks)

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