Chapter 1: Intro and Mathematical Concepts

Question 0

Unit of length

Answer 0

Meter (m)

Question 1

SI units

Answer 1

The system of units

Question 2

Unit of mass

Answer 2

Kilogram (kg)

Question 3

Unit of time

Answer 3

Second (s)

Question 4

Refers to the fact that these units are used along with various laws to define additional units for other physical quantities, suck as force and energy

Answer 4

Base

Question 5

Derived

Answer 5

The type of units for other physical quantities; they are combinations of the base units

Question 6

The term used to refer to the physical nature of a quantity and the type of unit used to specify it

Answer 6

Dimension

Question 7

What does IGUESS stand for

Answer 7

Illustration
Givens
Unknowns
Equations
Substitution
Solution

Question 8

Measurement uncertainty

Answer 8

Exists in every measurement; affects the accuracy of the value

Question 9

Accuracy

Answer 9

The extent to which a measured value agrees with the accepted value for that quantity

Question 10

Precision

Answer 10

The exactness of a measurement; characterized by the number of digits obtained from the measuring instrument

Question 11

Can you completely eliminate measurement uncertainty?

Answer 11

No

Question 12

What is measurement uncertainty caused by?

Answer 12

Systematic error and random error

Question 13

Systematic error

Answer 13

Inherent in the measuring tool itself

Always occurs the same way, every time the equipment is used

Question 14

Random error

Answer 14

Unpredictable effect from laboratory environment or human interaction with equipment
May or may not occur in any given trial

Question 15

Example of systematic error

Answer 15

Stopwatch runs slow or fast

Meter stick is of incorrect size

Question 16

Example of random error

Answer 16

Rounding off measurement number when reading instruments

Reaction time while operating stopwatch

Question 17

How to calculate percent error

Answer 17

                     X

                   100

measured value - accepted value |
————————————————
accepted value

Question 18

Scalar quantity

Answer 18

One that can be described with a single number (including any units) giving its size or magnitude

Question 19

Vector quantity

Answer 19

A quantity that deals inherently with both magnitude and direction

Question 20

Ex of scalar quantity

Answer 20

Temperature: 20* C

Mass 85 kg

Question 21

The length and magnitude of a vector are proportional

Answer 21

True

Question 22

A quantity that is positive or negative is always a scalar or vector

Answer 22

False

Question 23

Resultant vector

Answer 23

The total vector when two vectors are added together

Question 24

What makes certain digits in a number significant?

Answer 24

The precision of the measurement - instrument being used