Chapter 1: Metric Conversions, Significant figures, Dimensional analysis

Question 1

Metric prefix for Picometer?

Answer 1

Pm = 10^12

Question 2

Metric prefix for nanometer?

Answer 2

Nm = 10^9

Question 3

Metric prefix for micrometer?

Answer 3

um = 10^6

Question 4

Metric prefix for millimeter?

Answer 4

mm = 10^3

Question 5

Metric prefix for centimeter?

Answer 5

cm = 10^2

Question 6

Metric prefix for decimeter?

Answer 6

dm = 10^1

Question 7

metric conversion of kilometer?

Answer 7

km (10^3)

Question 8

metric conversion for mega meter?

Answer 8

Mm (10^6)

Question 9

How do you round off numbers to the correct number of sig figs?

Answer 9

The number in the equation with the least amount of significant figures will be the number of sig figs your answer should have.
EX: 1.55 + 3.5 = 5.1 (rounded off to two sig figs)

Question 10

What do you do with zeros in the number (regarding sig figs)?

Answer 10

Type I - Internal zeros. These are always significant
Examples: 87.027 g = 5 sig figs
Type II - Leading Zeros. These are never significant
Examples: 0.0042 km = 2 sig figs (4.2 x 10-3 km)
Type III: Trailing zeros after the decimal- These are always significant.
These zeros are real, measured numbers
Examples: 14.30 joules = 4 sig figs
Type IV – Trailing zeros before the decimal- this is a tricky one! Maybe they are
significant maybe they are not !! - It could be either way.
Examples: 690 g = at least 2 but maybe 3 sig figs- we can’t tell as written