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