Quiz 3 (Sections 2.1-2.2)

Question 1

What is the rule for calculating significant digits when performing a series of calculations

Answer 1

round your answers to significant figures only at the end of all calculcations to avoid multiple rounding errors. If an intermediate value is so long that it must be rounded, keep atleast one more digit than the significant digit rules allow.

Question 2

What is the rule for calculating significant digits when averaging a series of measurements

Answer 2

the average should not have more significant digits than the measured values

Question 3

the closeness of a measurement to the quanitity’s actual value

Answer 3

accuracy

Question 4

kilo-

Answer 4

one thousand

Question 5

mathematical statement that two expressions are equal

Answer 5

equation

Question 6

standard of measure

Answer 6

a specific measure to which other measures are compared to ensure uniformity

Question 7

one thousand

Answer 7

kilo-

Question 8

What is the rule for calculating significant digits when adding and subtracting

Answer 8

results are rounded to the last place that is significant in the least accurate measurement

Question 9

What are the five rules that can be used to determine how many significant digits are in a given value

Answer 9

1. All nonzero digits are significant.
2. Zeros at the beginning of a number are NEVER significant.
3. Zeros between nonzero digits are significant.
4. Zeros that are at the end of a number that has a decimal point are significant.
5. Zeros at the end of a number that does not have a decimple point are placeholders and are considered NOT significant.

Question 10

metric system

Answer 10

system of measurement developed in France that uses prefixes attached to base units to make new units

Question 11

Why is it measured data must include units?

Answer 11

A measurement must have units to be meaningful

Question 12

What is the rule for calculating significant digits when multiplying and dividing

Answer 12

the answer is rounded to the same number of significant digits as the least significant factor

Question 13

a specific measure to which other measures are compared to ensure uniformity

Answer 13

standard of measure

Question 14

system of measurement developed in France that uses prefixes attached to base units to make new units

Answer 14

metric system

Question 15

equation

Answer 15

mathematical statement that two expressions are equal

Question 16

accuracy

Answer 16

the closeness of a measurement to the quanitity’s actual value