Measurements and Errors

Question 1

T

Answer 1

10^ 12

Question 2

G

Answer 2

10^ 9

Question 3

M

Answer 3

10^ 6

Question 4

k

Answer 4

10^ 3

Question 5

c

Answer 5

10^ 2

Question 6

m

Answer 6

10^ -3

Question 7

μ

Answer 7

10^ -6

Question 8

n

Answer 8

10^ -9

Question 9

p

Answer 9

10^ -12

Question 10

f

Answer 10

10^ -15

Question 11

eV to J

Answer 11

x 1.6 x 10 ^-19

Question 12

J to kWh

Answer 12

/ 3.6 x10^ 6

Question 13

define random error

Answer 13

Unpredictable errors from uncontrollable factors

Question 14

Define systematic error

Answer 14

faulty instruments or practice

includes zero error

Question 15

define precision

Answer 15

Measure of spread about the mean

Question 16

define accuracy

Answer 16

How close to TRUE VALUE

Question 17

percentage uncertainty =

Answer 17

absolute uncertainty / measured value x 100

Question 18

uncertainty of a reading

Answer 18

+- 1/2

Question 19

uncertainty of measurement

Answer 19

+- 1

Question 20

uncertainty of repeated data

Answer 20

+- 1/2 RANGE

Question 21

uncertainty of digital reading

Answer 21

+- last sig fig

Question 22

Adding uncertainty

Answer 22

Add ABSOLUTE

Question 23

X uncertainties

Answer 23

add PERCENTAGE uncertainties

Question 24

Raising to power uncertainties

Answer 24

MULTIPLY PERCENTAGE uncertainty by power

Question 25

define error bars

Answer 25

Shows ABSOLUTE uncertainty of graph

Question 26

percentage uncertainty from graph = (gradient)

Answer 26

best grad - worst grad / BEST grad x 100

Question 27

percentage uncertainty from graph = (y intercept)

Answer 27

best y - worst y / BEST y x 100