Foundations of Physics

Question 1

What is the value of pico (p)?

Answer 1

1 x 10^-12

Question 2

What is the value of nano (n)?

Answer 2

1 x 10^-9

Question 3

What is the value of micro (μ)?

Answer 3

1 x 10^-6

Question 4

What is the value of milli (m)?

Answer 4

1 x10^-3

Question 5

What is the value of centi (c)?

Answer 5

1 x 10^-2

Question 6

What is the value of deci (d)?

Answer 6

1 x 10^-1

Question 7

What is the value of kilo (k)?

Answer 7

1 x 10^3

Question 8

What is the value of mega (M)?

Answer 8

1 x 10^6

Question 9

What is the value of giga (G)?

Answer 9

1 x 10^9

Question 10

What is the value of tera (T)?

Answer 10

1 x 10^12

Question 11

What are the 4 rules of graphs?

Answer 11

1) Headings/labels with units
2) All values same SF
3) Label axes
4) Must cover 75% of space

Question 12

Define error:

Answer 12

difference between the result obtained and the true value of the quantity

Question 13

Define true value:

Answer 13

value that would be obtained in an ideal measurement

Question 14

What are random errors?

Answer 14

measurement errors where the results vary unpredictably due to the environmental conditions and equipment

Question 15

How are random errors mitigated?

Answer 15

repeats

Question 16

What are systematic errors?

Answer 16

measurement differs from the true value by a consistent amount each time caused by equipment or way measurements are taken

Question 17

Define accuracy:

Answer 17

how close measurement is to the true value

Question 18

Define precision:

Answer 18

how close repeated measurements are to each other

Question 19

Define uncertainty:

Answer 19

interval in which the true value should lie

Question 20

How do you calculate absolute uncertainty?

Answer 20

+/-(range of measurements/2)

Question 21

How do you calculate percentage uncertainty?

Answer 21

(absolute uncertainty/actual value) x 100

Question 22

Overall uncertainty when adding quantities:

Answer 22

+ absolute uncertainties

Question 23

Overall uncertainty when multiplying or dividing:

Answer 23

+ percentage uncertainties

Question 24

Overall uncertainty when raising by power n:

Answer 24

percentage uncertainty x n

Question 25

What do error bars in a graph show?

Answer 25

absolute uncertainty

Question 26

How do you calculate uncertainty gradient?

Answer 26

line of worst fit passing though all error bars

Question 27

How do you calculate percentage uncertainty from a graph?

Answer 27

((grad lofbf - grad lowf)/(grad lofbf)) x 100

Question 28

What does a scalar show?

Answer 28

magnitude not direction

Question 29

What does a vector show?

Answer 29

magnitude and direction

Question 30

What is a resultant vector?

Answer 30

vector that represents many vectors