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PHYSICS > REVIEWER > Flashcards

REVIEWER Flashcards

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AP® Physics flashcards Physics 101 flashcards
1
Q

TWO METHODS OF MEASUREMENT

A

Direct and indirect method of measurement

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2
Q

is the process of comparing an unknown
quantity with a known quantity or with a
standard

A

Measurement

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3
Q

simplest types of quantities & cannot be
reduced further

A

Fundamental Quantities

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4
Q

amount of molecules or particles in a body

A

Mass

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5
Q

lapse of one event to another event; duration

A

Time

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6
Q

quantities that are taken or
formulated from two or more fundamental quantities
Example: Area = LW; V = LWH; d = m/V; speed = d/t

A

Derived Quantities

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7
Q

has magnitude and appropriate unit

A

Scalar quantity

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8
Q

has magnitude, appropriate unit and direction

A

Vector quantity

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9
Q

can be used to make a new
unit larger or smaller than the base

A

Unit prefixes

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10
Q

practical way of checking
mathematical equations by finding out whether they are
consistent in terms of their dimensions.

A

Dimensional analysis

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11
Q

there are three basic or fundamental
quantities. These 3 quantities are:

A

Length (meter)
Mass (kilogram)
Time (second)

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12
Q

denote the dimension of a physical quantit

A

Bracket

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13
Q

an equation that
shows the equivalent amounts of different units.

A

Unit Equality or conversion factor

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14
Q

A “short cut” to writing extremely large or small numbers by expressing
them as a number between 1 & 10 multiplied by a power of 10.

A

Scientific notation

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15
Q

Two kinds of certainty (or uncertainty) in scientific
measurement:

A

Accuracy
Precision

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16
Q

Concerns how closely a
measurement or series
of measurements
reflects the actual
value.
 If the set of measurements
is close to the true or
accepted value

A

Accuracy

17
Q

How close several
measurements are
to each other.
 The values are close
to one another.

A

Precision

18
Q

Two classes of error

A

Systematic and random error

19
Q

When the error produced is always of the same sign.
 It is committed if the measurement tends to make all
observations too big or too small.

A

Systematic error

20
Q

Systematic error classified into three

A

1.) Instrumental errors
2.) Personal
3.) External

21
Q

errors that involve some peculiarity or bias of the
observer, like the tendency to assume that the first reading is
correct. This is also committed due to eye strain, fatigues, or
position of the eye in reading the scale.

A

Personal

22
Q

errors caused by faulty or inaccurate
apparatus.

A

Instrumental errors

23
Q

errors that are caused by external conditions like
temperature, humidity, wind, and vibrations.

A

External

24
Q

When positive and negative errors are equally probable to
occur.
 These errors are erratic errors that are variations due to a lot of
factors, each of which adds or contributes to the total error.
 These factors vary and are unknown

A

Random error

25
Q

“If one quantity increases, the
other quantity increases at the same rate. If one
quantity decreases, the other quantity decreases at
the same rate.

A

Direct proportion

26
Q

“If one quantity increases, the
other quantity decreases at the same rate. If one
quantity decreases, the other quantity increases at
the same rate

A

Inverse Proportion

27
Q

The vector quantity that signifies the magnitude of the rate of change of position and also the direction of an objects movement.

A

Velocity

28
Q

Scalar quantity that signifies only the magnitude of the rate of the rate of change of an objects movement

A

Speed

29
Q

How far and in what direction the object is from its starting place.

A

Displacement

30
Q

The total length of an objects travel

A

Distance

31
Q

represented by an
arrow: the length represents the
magnitude & the head of the arrow
indicates the direction; the tail
represents the origin.

A

Vector

32
Q

Two or more vectors can be represented by a single
vector

A

Resultant vector

PHYSICS (4 decks)

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