Unit 1- Concept 2: Dimensional Analysis and Scienfic Notation

Question 1

Purpose of Dimensional analysis

Answer 1

A technique of converting numbers into different units, without changing their value

Question 2

How is dimensional analysis done?

Answer 2

By multiplying given numbers by conversion factors in order to get desired units

Question 3

Conversion factors

Answer 3

ratios of eqivalent values
24 hrs/1 day
1 day/24 hours

Question 4

Purpose of scientific notation

Answer 4

A technique used to write very large or very small numbers into a format that is easier to use

Question 5

Format of scientific notation

Answer 5

Just the digits with a decimal point after the first digit, followed by x 10 to the power which represents how many places the decimal was moved

Question 6

If you start with a number more than one in scientific notation

Answer 6

Make the exponent positive (move decimal to the left)

Question 7

If you started with a number less than one in scientific notation

Answer 7

Make the exponent negative (move decimal to the right)

Question 8

When turning a scientific notation into standard notation:

Answer 8

negative exponent: move to the left
Positive exponent: move to the right