Chapter 2: Foundations in Physics

Question 1

how do you measure absolute uncertainty

Answer 1

mean value +/- 0.5 x range

Question 2

how do you measure percentage uncertainty

Answer 2

absolute uncertainty / measurement x 100

Question 3

what are SI units?

Answer 3

Fundamental base units of physical quantities

Question 4

SI unit of mass

Answer 4

kilogram

Question 5

SI unit for amount of substance

Answer 5

mol

Question 6

SI unit for current

Answer 6

Amperes

Question 7

SI unit for temperature

Answer 7

Kelvin

Question 8

SI unit for length

Answer 8

meters

Question 9

What quantity is measured in seconds?

Answer 9

Time

Question 10

What multiplier is associated with the prefix kilo?

Answer 10

10^3

Question 11

What multiplier is associated with the prefix femto?

Answer 11

10^-15

Question 12

What is accuracy?

Answer 12

Measure of how close a measured value is to the true, accepted value

Question 13

What is validity?

Answer 13

Measures what it is supposed to be measuring

Question 14

What is a random error?

Answer 14

Error that occurs due to unexpected changes

Question 15

What is an anomaly?

Answer 15

data point that does not fit the trend of the data

Question 16

What is a systematic error?

Answer 16

Faults in equipment or experimental methods.

Question 17

3 ways of reducing random error