Q1 Flashcards

1
Q

The difference between the measured/estimated value from the true value is called the?

A

error

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2
Q

2 Types of error

A

RANDOM
SYSTEMATIC

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3
Q

Errors you cannot control

E.g. measuring something and it ends in the middle of lines so you estimate.

A

Random error

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4
Q

start measurement with zero to lessen uncertainty

A

Zeroing uncertainty

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4
Q

broken equipment

wrong usage of equipment

A

Systematic error

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5
Q

this means doubt about the validity of the result of a measurement.

A

Uncertainty of measurements

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6
Q

you decide for yourself what the measurement is

A

Judgement uncertainty

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7
Q

thumb to pinky

A

handspan

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8
Q

1 finger =

A

1 digit

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9
Q

tallest finger to elbow

A

cubit

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10
Q

1 foot step

A

pace

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11
Q

one hand to another

A

armspan

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12
Q

size of foot

A

foot span

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13
Q

Measurements that are based on human body dimensions or common movements. They are often used in informal contexts or historical settings.

A

NON-STANDARDIZED MEASUREMENTS

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13
Q

These measurements are inaccurate due to variability among individuals, lack of universal standards, inconsistent application, and their practical rather than precise nature.

A

NON-STANDARDIZED MEASUREMENTS

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14
Q

Also referred to as imperial units

A

ENGLISH MEASUREMENTS

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15
Q

A measurement system acknowledged internationally.

Decimal-based

Originated in France

A

METRIC UNITS

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16
Q

The difference between the measure/estimated value from the true value.

A

ERROR

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17
Q

refers to consistent, repeatable inaccuracies in measurements that occur due to flaws in the measurement process or equipment.

A

SYSTEMATIC ERROR

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18
Q

the variability in measurements that arise from unpredictable fluctuations and uncertainties inherent in any measurement process.

A

RANDOM ERROR

19
Q

Determining the weight using equipment with using your judgment as a second opinion

A

Judgment Uncertainty

20
Q

t or f

All non-zero numbers are significant.

21
Q

t or f

Zeros between two non-zero digits are not significant.

A

f

Zeros between two non-zero digits are significant.

22
Q

Leading zeros are significant.

t or f

A

f

Leading zeros are not significant.

23
Trailing zeros to the right of the decimal are significant. t or f
true
24
Trailing zeros in a whole number with the decimal shown are significant. t or f
true
25
Trailing zeros in a whole number with no decimal shown are significant. t or f
false Trailing zeros in a whole number with no decimal shown are not significant.
26
numbers that are exact 1 dozen = 12 eggs
discrete
27
have both magnitude and direction E.g. displacement, velocity, momentum, force, lift, thrust Represented with the use of arrows
Vector quantities
27
indicates the direction in which the vector is pointing.
Head of the arrow
27
numbers that are not exact 12 inches =13.48 cm
continuous
28
have magnitude but no direction E.g. volume, area, energy, work, pressure
Scalar quantities
29
represents the starting point or origin of the vector
Tail of the arrow
30
represents the magnitude of the vector
Length of the arrow
31
North South East West
Cardinal directions
32
Northeast (NE) - 45º N of E / 45º E of N Northwest (NW) - 45º N of W / 45º W of N Southeast (SE) - 45º S of E / 45º E of S Southwest (SW) - 45º S of W / 45º W of S
Intercardinal directions
33
Vector sum of 2 or more vectors; produces the same combined effect
Resultant vector / resultant (FR)
34
Called---- because vectors are connected at the tail at the same point of origin
tail to tail
34
Called -------- method because you create a parallelogram by drawing imaginary lines parallel to each vector. Once these imaginary lines meet, a diagonal line from the same origin is drawn to the point of intersection of the imaginary lines. This diagonal line is the resultant vector.
parallelogram
35
Same magnitude compared to the resultant vector but in the opposite direction.
Equilibrant vector (FE)
36
A + B = B + A The order in which you add numbers does not change the sum.
Commutative
37
(A + B) + C = A + (B + C) the way in which numbers are grouped when adding does not change the sum.
Associative
38
Used when it is already confirmed that the given vectors form right angles which means they can also form right triangles
ANALYTICAL METHOD
39
used when there are right triangles present
pythagorean theorem:
40
used to find the missing side or angle of a right triangle
trigonometric functions / SOHCAHTOA:
41
formula: x= r cos 0 y= r sin 0
NoW, NoE, SoW, SoE
42
formula: x= r sin0 y= r cos0
WoN, WoS, EoN, EoS
43
Conducting of experiments Use of motion sensors, force tables, etc.
EXPERIMENTAL METHOD