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Flashcards in Quicksheets Deck (83):
1

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

average, outliers

2

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

central value, outliers

3

Mode is the _____ of the data set.

most common data point(s)

4

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

spread out, mean

5

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

P(A) x P(B)

6

For independent events, P(A or B) =

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

7

null hypothesis states ________

hypothesis that there is no relationship between measured phenomena

8

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

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

9

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

believed to contain the true value, probability

10

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

being observed

11

Confounder: a variable that relates to _______ is ______.

the independent and dependent variables, overlooked

12

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

round the other down

13

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

round the other up

14

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

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

15

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

49, 64, 81, 100

16

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

121, 144, 169, 196, 225

17

16^2, 17^2

256, 289

18

18^2, 19^2

324, 361

19

log (AB) =

logA + logB

20

log (A/B) =

logA - logB

21

logA^B =

BlogA

22

log(1/A) =

-logA

23

logx = ____/____

lnx/2.303

24

log(n x 10^m) ~

m + 0.n

25

Triangle: 1,2,rad3 has angles

rad3 opposite 60
2 opposite 90
1 opposite 30

26

45, 45, 90 has sides

1, 1, rad 2

27

radical 3 is about

1.7

28

radical 2 is about

1.4

29

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

=hf
=hc/lambda

30

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

hf - W

31

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 ______.

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

32

Alpha decay is the ejection of ____

Helium

33

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

neutron converted to a proton, electron is ejected

34

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

proton converted to a neutron, positron is ejected

35

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

proton becomes a neutron

36

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

divided by the speed of light in that medium

37

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

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

38

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

toward

39

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 = _________

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

40

Inversion o __ inversion ___ = inversion __ = ___

+ inversion i
= inversion f
= 2/r

41

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

concave

42

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

virtual, upright

43

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

1/f = 1/i + 1/o

44

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

real and inverted

45

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

virtual, upright, enlarged

46

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

focal length

47

Inverted images have a _____ m

negative

48

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

reduced

49

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

the same size

50

m is equal to the _____ of ____

negative of i/o

51

the speed of light is ____

3x10^8 m/s

52

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

deformable, parallel

53

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

power/area

54

An increase of 10 decibals means the intensity increased by

x10

55

An increase of 20 decibals means the intensity increases by

x100

56

Sound level = 10 x the ______ of ______

log of I/Io

57

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 ______

detector, source

58

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.

positive, negative, opposite

59

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

the sea, a slinky

60

The frequency of a wave relates to its period as ___

its inverse

61

The velocity of a wave is equal to ___ times __

v= f x lambda

62

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

strings, open or closed

63

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

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

Open ends of pipes are always _____.

antinodes

65

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

2L/n
string

66

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

4
1,3,5...

67

Current flows from _____ to ______ potential.

high to low

68

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

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

69

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

an entire circuit

70

Voltage equals ___ x ___

current x resistance
V = IR

71

An increase in temperature, has this effect on resistance

increases

72

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

length, resistivity, area

73

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

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

74

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

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

75

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

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

76

At any junction, incoming _____ is equal to outgoing.

At any junction, incoming current is equal to outgoing.

77

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

voltage, C = Q/V

78

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

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

79

formal charge is equal to the valence _____ sticks _____ dots

minus, minus

80

The force of attraction between two particles is equal to

kQq/r^2

81

sin 0,30,45,60,90

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

82

cos 0,30,45,60,90

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

83

tan 0,30,45,60,90

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