Question 1

Which of the following numbers contains exactly three significant figures?

Accepted Answer

$$0.00450$$

Question 2

When multiplying $$2.34 ($$three significant figures) by $$0.056 ($$two significant figures), how many significant figures should the final answer have?

Accepted Answer

Two

Question 3

Which of the following measurements is most appropriate for expressing the mass of a human body?

Accepted Answer

Kilograms $$(kg)$$

Question 4

A scientist enters the number $$1230.370$$ into a calculator. If the number actually has five significant figures, how should it be written?

Accepted Answer

Question 5

Which of the following numbers has four significant figures?

Accepted Answer

$$0.01250$$

Question 6

When expressed in scientific notation, the number $$-0.00297$$ becomes:

Accepted Answer

$$-2.97 	imes 10$$^{-3}$$

Question 7

How many significant figures are in the measurement $$0.01025$$?

Accepted Answer

Four

Question 8

A car’s mass is $$1,360,000 g. $$How should this be written in kilograms using the correct number of significant figures?

Accepted Answer

$$1.36 	imes 10^3$ kg

Question 9

Which rule applies when determining the number of significant figures in the sum $$12.34 + 0.0567 + 1.2$$?

Accepted Answer

The answer should have the same number of decimal places as the measurement with the fewest decimal places.

Question 10

A laser pulse is $$0.15 ns $$long. What is the length of this pulse in picoseconds $$(ps)$$?

Accepted Answer

$$150 ps$$

Question 11

Which of the following is NOT a rule for determining significant figures?

Accepted Answer

Trailing zeros in a number without a decimal point are always significant.

Question 12

A ball is measured to have a mass of $$0.0450 kg. $$How many significant figures does this measurement have?

Accepted Answer

Four

Question 13

Which of the following is the correct way to report the sum $$13.6 + 0.432$$ using significant figures?

Accepted Answer

$$14.0$$

Question 14

Which measurement is most appropriate for expressing the radius of an atom?

Accepted Answer

Nanometers $$(nm)$$

Question 15

If you measure the length of a table as $$1.234 m$$, what is the number of significant figures in your answer?

Accepted Answer

Four

Question 16

Which of the following numbers has only one significant figure?

Accepted Answer

$$0.0007$$

Question 17

A ball is measured to have a diameter of $$0.01250 m. $$How many significant figures does this measurement have?

Accepted Answer

Five

Question 18

Which of the following is the correct way to report the product $$2.5 	imes 3.42$$ using significant figures?

Accepted Answer

$$8.6$$

Question 19

Which of the following is the correct number of significant figures in $$1.0070 	imes 10^3$?

Accepted Answer

Five

Question 20

A ball is measured to have a mass of $$0.045 kg. $$How many significant figures does this measurement have?

Accepted Answer

Three

Units and Significant Figures in Data

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드