physics mod 1 to 4

Question 1

factor used to convert one unit of measurement into another

Answer 1

conversion factor

Question 2

amongst the most valuable tools that physical scientists use. conversion between an amount in one unit to the corresponding amount in the desired unit

Answer 2

dimensional analysis

Question 3

two ways that scientists think about error

Answer 3

precision and accuracy

Question 4

refers to how close a measurement is to the true or accepted value

Answer 4

accuracy

Question 5

refers to how close a measurement of the same item are to each other

Answer 5

precision

Question 6

is independent of accuracy

Answer 6

precision

Question 7

is consistent, repeatable error associated with faulty equipment or a flawed experiment design

Answer 7

systematic error ( also called systematic bias)

Question 8

has no patter. you cant predict and these errors are usually unavoidable

Answer 8

random error

Question 9

usually caused by measuring instruments that are incorrectly calibrated or are used incorrectly

Answer 9

systematic errors

Question 10

are completely random. they are unpredictable and cant. be replicated

Answer 10

random errors

Question 11

produce consistent errors, either a fixed amount or a proportion

Answer 11

systematic errors

Question 12

types of systematic error

Answer 12

offset error and scale factor errors

Question 13

type of systematic error where the instrument isnt set to zero when you start to weigh items. results in consistently wrong readings

Answer 13

offset error

Question 14

errors that are proportional to the true measurement. increase or decrease the true value by a proportion or percentage

Answer 14

scale factor errors

Question 15

do not follow a pattern

Answer 15

random errors

Question 16

the physical quantities which have only magnitude are known as

Answer 16

scalar quantities

Question 17

fully described by a magnitude or a numerical value. it does not have directions.

Answer 17

scalar quantity

Question 18

is a measure of quantity

Answer 18

scalar

Question 19

the physical quantities for which both magnitude and direction are defined distinctly are known as

Answer 19

vector quantities

Question 20

has direction

Answer 20

vector quantity

Question 21

are represented as a combination of direction and magnitude and they are drawn with an arrow representation

Answer 21

vectors

Question 22

can be used for the addition of vectors

Answer 22

famous triangle law also called head to tail method

Question 23

putting two or more vectors together.

Answer 23

vector addition

Question 24

are represented as a combination of direction and magnitude and are written with an alphabet and an arrow over them

Answer 24

vectors

Question 25

is a mathematical object with a magnitude and a direction. often visualized as arrows starting from the origin

Answer 25

vector

Question 26

allows us to write very large numbers or very small in amore convenient way. widely used by engineers and scientists.

Answer 26

scientific notation

Question 27

the way scientists and engineers handle numbers that are very large or numbers that are very small

Answer 27

scientific notation

Question 28

are digits in the number that are reliable and necessary to indicate the quantity of something

Answer 28

significant figures

Question 29

isnt very descriptive about the exact rate of motion of an object at a specific time

Answer 29

average velocity

Question 30

is the change of velocity over a period of time

Answer 30

average acceleration

Question 31

when a moving object slows down. also called negative acceleration

Answer 31

deceleration

Question 32

when a moving object changes direction

Answer 32

accelerating

Question 33

the change of velocity over an instance of time

Answer 33

instantaneous acceleration

Question 34

defined as the limit of the average acceleration when the interval of time considered approaches 0

Answer 34

instantaneous acceleration

Question 35

when the velocity changes the same amount un every equal time period

Answer 35

constant or uniform acceleration

Question 36

a motion that is characterized for having a movement in a straight line and a constant acceleration and different of zero

Answer 36

uniformly accelerated motion

Question 37

the laws of physics which apply when are at rest on the earth..

Answer 37

relative motion

Question 38

is the calculation of the motion of an object with regard to some other moving or stationary object

Answer 38

relative motion