lecture 3

Question 1

Measurement is

Answer 1

the comparison of a physical quantity to be measured with a unit of measurement

Question 2

precision

Answer 2

refers to the closeness of the set of values obtained from identical measurements of a quantity.

Question 3

Accuracy is

Answer 3

a related term; it refers to the closeness of a single measurement to its true value.

Question 4

Significant figures are

Answer 4

are those digits in a measured number (or result of the calculation with a measured number) that include all certain digits plus a final one having some uncertainty

Question 5

An exact number is

Answer 5

a number that arises when you count items or when you define a unit.

Question 6

All nonzero digits are

Answer 6

significant

Question 7

Zeros between significant figures are

Answer 7

significant

Question 8

Zeros preceding the first nonzero digit are

Answer 8

non significant

Question 9

Zeros to the right of the decimal after a nonzero digit are

Answer 9

significant

Question 10

When multiplying and dividing measured quantities, give as many significant figures as

Answer 10

the least found in the measurements used.

Question 11

When adding or subtracting measured quantities, give the same number of

Answer 11

decimals as the least found in the measurements used.