Flashcards in Quicksheets Deck (83):
Mean is the ______ of the data points, and is heavily impacted by o______.
Median is the ______ of the data set, and is not affected by ______.
central value, outliers
Mode is the _____ of the data set.
most common data point(s)
Standard deviation is a measure of how ______ values are from the _____.
spread out, mean
For independent events, P(A and B) = __ x __
P(A) x P(B)
For independent events, P(A or B) =
P(A) + P(B) - [P(A) x P(B)]
null hypothesis states ________
hypothesis that there is no relationship between measured phenomena
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
Confidence interval is the range of values ___________, within a given level of _______
believed to contain the true value, probability
Hawthorne effect: behavior is modified in response to the awareness of ______
Confounder: a variable that relates to _______ is ______.
the independent and dependent variables, overlooked
To estimate the product, if you round one number up, ___
round the other down
To estimate the quotient, if you round one number up,
round the other up
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)
7^2, 8^2, 9^2, 10^2
49, 64, 81, 100
11^2, 12^2, 13^2, 14^2, 15^2
121, 144, 169, 196, 225
log (AB) =
logA + logB
log (A/B) =
logA - logB
logx = ____/____
log(n x 10^m) ~
m + 0.n
Triangle: 1,2,rad3 has angles
rad3 opposite 60
2 opposite 90
1 opposite 30
45, 45, 90 has sides
1, 1, rad 2
radical 3 is about
radical 2 is about
The energy of a photon is equal to Planck' constant times ____, and and equivalent statement is ___
The maximum kinetic energy of an ejected electron is equal to _____ minus ______
hf - W
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
Alpha decay is the ejection of ____
In beta minus decay, a _____ is converted to a ______, and _____ is ejected.
neutron converted to a proton, electron is ejected
In beta plus decay, a _____ is converted to a _______, and ______ is ejected.
proton converted to a neutron, positron is ejected
In electron capture, an electron is absorbed, and a ______ becomes a _____
proton becomes a neutron
The index of refraction of a given medium is equal to the speed of light _______
divided by the speed of light in that medium
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
If light enters from medium 1 into 2, and n2>n1, light will bend _____ the normal
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...
Inversion o __ inversion ___ = inversion __ = ___
+ inversion i
= inversion f
If an object is placed inside the focal length of a _____ mirror, the image formed is behind the mirror, enlarged, and virtual.
Regardless of the position of the object, a convex mirror forms only a ______, _____ image.
The optics equation for a thin spherical lens is inverse ___ = inverse ____ + inverse _____
1/f = 1/i + 1/o
For a converging lens, an object beyond the focal length is r____ and i_____.
real and inverted
For an object inside the focal length of a converging lens, the image formed is v____, u_____, and e_____.
virtual, upright, enlarged
No image is seen through a converging lens if the object is at the ____
Inverted images have a _____ m
if the absolute value of m is less than 1, the image is ____
if the absolute value of m is equal to 1, the image is ___
the same size
m is equal to the _____ of ____
negative of i/o
the speed of light is ____
Sound propagates through a _____ medium by the oscillation of particles _______ the direction of the wave's propagation.
The intensity of sound is equal to its ________ _______ by ________
An increase of 10 decibals means the intensity increased by
An increase of 20 decibals means the intensity increases by
Sound level = 10 x the ______ of ______
log of I/Io
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 ______
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
A transverse wave is like ___ and a longitudinal wave is like ______.
the sea, a slinky
The frequency of a wave relates to its period as ___
The velocity of a wave is equal to ___ times __
v= f x lambda
Standing waves occur in _____, and pipes, ____ or ____
strings, open or closed
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.
Open ends of pipes are always _____.
The wavelength of a standing wave within an open pipe is equal to ______. The formula is the same of a standing wave in a ___.
For a standing wave in a closed pipe, the wavelength equals the length of the pipe times ______, divided by n = _______.
Current flows from _____ to ______ potential.
high to low
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
Ohm's law can be applied to two things: an individual resistor or ______.
an entire circuit
Voltage equals ___ x ___
current x resistance
V = IR
An increase in temperature, has this effect on resistance
resistance is equal to the ______ of the resistor times its ____ivity, divided by its ____
length, resistivity, area
In series, _____ gets split. In parallel, ____ gets split.
In series, voltage drops get split. In parallel, current gets split.
Reciprocal resistance for circuits in _________. Reciprocal capacitance for circuits in _____.
Reciprocal resistance for circuits in parallel. Reciprocal capacitance for circuits in series.
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.
At any junction, incoming _____ is equal to outgoing.
At any junction, incoming current is equal to outgoing.
Capacitance is the ability to store charge per unit ____, so the formula is _____
voltage, C = Q/V
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
formal charge is equal to the valence _____ sticks _____ dots
The force of attraction between two particles is equal to
0, 1/2, 1/rad2 ,1/rad3, 1
1, (rad3)/2, (rad2)/2, 1/2, 0