Chapter E - units, measurements and problem solving

Question 1

What is the standard unit of measure for length?

Answer 1

meters (m)

Question 2

what is the standard unit of measure for mass?

Answer 2

kilograms (kg)

Question 3

What is the standard unit of measurement for time?

Answer 3

seconds (s)

Question 4

What is the standard unit of measurement for volume?

Answer 4

liters (L)

Question 5

what is the standard unit of measurement for Amount of substance?

Answer 5

mole (mol)

Question 6

What is the standard unit of measurement for Electric current?

Answer 6

Ampere (A)

Question 7

What is the standard unit of measurement for Luminous Intensity?

Answer 7

Candela (cd)

Question 8

what is the symbol and the multiplier of the prefix kilo?

Answer 8

symbol: k Multiplier: 1000 (10^3)

Question 9

What is the symbol and multiplier of the prefix deci?

Answer 9

symbol: d multiplier: 0.1 (10^-1)

Question 10

What is the symbol and multiplier of the prefix centi?

Answer 10

symbol: c multiplier: 0.01 (10^-2)

Question 11

what is the symbol and multiplier of the prefix milli?

Answer 11

symbol: m multiplier: 0.001 (10^-3)

Question 12

what is the symbol and multiplier of the prefix micro?

Answer 12

symbol: μ multiplier: 0.000001 (10^-6)

Question 13

What is the symbol and multiplier of the prefix nano?

Answer 13

symbol: n multiplier: 0.000000001 (10^-9)

Question 14

What is the symbol and multiplier of the prefix pico?

Answer 14

symbol: p multiplier: 0.000000000001 (10^-12)

Question 15

what is the symbol and multiplier of the prefix femto?

Answer 15

symbol: f multiplier: 0.000000000000001 (10^-15)

Question 16

What is the symbol and multiplier of the prefix atto?

Answer 16

symbol: a multiplier: 0.000000000000000001 (10^-18)

Question 17

What is the symbol and multiplier of the prefix mega?

Answer 17

symbol: M multiplier: 1,000,000 (10^6)

Question 18

What is the symbol and multiplier of the prefix giga?

Answer 18

symbol: G multiplier: 1,000,000,000 (10^9)

Question 19

What is the symbol and multiplier of the prefix tera?

Answer 19

symbol: T multiplier 1,000,000,000,000 (10^12)

Question 20

What is the symbol and multiplier of the prefix peta?

Answer 20

symbol: P multiplier: 1,000,000,000,000,000 (10^15)

Question 21

What is the symbol and multiplier of the prefix exa?

Answer 21

symbol: E multiplier: 1,000,000,000,000,000,000 (10^18)

Question 22

What is the equation to convert temperature from Celsius to Kelvin?

Answer 22

K = C + 273.15

Question 23

What is the equation to convert temperature from Celsius to Kelvin?

Answer 23

C = K - 273.15

Question 24

What is the equation to convert temperature from Fahrenheit to Celsius?

Answer 24

C = (F-32)/1.8

Question 25

What is the equation to convert from Celsius to Fahrenheit?

Answer 25

F = 1.8(C) +32

Question 26

What is the equation for Density?

Answer 26

Density (g/cm^3) = mass(g)/volume(cm^3)

Question 27

when considering the reliability of measurements what does the number of reported digits represent?

Answer 27

The certainty in the measurement

Question 28

what is the significance of scientific measurements?

Answer 28

they are reported so every digit is certain except the last, which is estimated

Question 29

What does accuracy mean?

Answer 29

how close a series of measurements are to the actual value

Question 30

What does precision mean?

Answer 30

how close a series of measurements are to one another

Question 31

What is a systematic error?

Answer 31

error is all off in the same direction can be identified and corrected

Question 32

what is a random error?

Answer 32

equal probability of measure being lower or higher than it should be difficult to correct or find source

Question 33

What are the significant figures of exact numbers?

Answer 33

infinite significant figures discreet objects - 100 pennies conversion factors 1in = 2.54cm integrals in an equation: radius = diameter/2

Question 34

What are the significant figures of nonzero digits?

Answer 34

always count as significant figures e.g. 536 (3sf) and 82.64 (4sf)

Question 35

What are the rules for significant figures with interior zeros?

Answer 35

they are always significant e.g. 4008 (4sf) and 2.06 (3sf)

Question 36

What are the rules for significant figures with place-holder zeros?

Answer 36

they are not significant 0.017 (2sf) 0.0000009 (1sf)

Question 37

What are the rules for significant figures with trailing zeros?

Answer 37

trailing zeros are always significant e.g. 0.1200 trailing zeros before an implied decimal point are ambiguous, but can be avoided by using scientific notation e.g. 54000 (5.4 x 10^4) = 2sf or 5.40 x 10^4) = 3sf

Question 38

When multiplying/dividing numbers, what should you be rounding numbers according to?

Answer 38

the significant figures