Chapter 1: Introduction, Measurement, Estimating

Question 1

Percent Uncertainty

Answer 1

ration of the uncertainty to the measured value, multiplied by 100

Question 2

Significant Figures

Answer 2

number of reliably known digits in a number

Question 3

Precision

Answer 3

repeatability of the measurement using a given instrument

Question 4

Accuracy

Answer 4

how close a measurement is to the true value

Question 5

Système International

Answer 5

standard unit of length is meter, mass is kilogram and time is second

Question 6

CGS System

Answer 6

standard unit of length is centimeter, mass is gram and time is second

Question 7

British Engineering System

Answer 7

standard unit of length is foot, mass is pound and time is second

Question 8

Inch

Answer 8

2.54 centimeters

Question 9

Meter

Answer 9

length of path traveled by light in a vacuum during a time interval of 1/299,792,458 of a second

Question 10

Second

Answer 10

frequency of radiation emitted by cesium atoms when they pass between two particular states

Question 11

Kilogram

Answer 11

mass of a platinum-iridium cylinder at the International Bureau of Weights and Measures

Question 12

Unified Atomic Mass Unit

Answer 12

I u = 1.6605 x 10^-27 kg