Practice Problems: Measurement
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1. How many significant figures are in the number 0.00305?
2. Round 3.14159 to 3 significant figures.
3. What is the result of 12.3 + 5.67 when expressed with the correct number of significant figures?
4. Multiply 2.5 x 3.20. Express your answer using the correct number of significant figures.
5. How many significant figures are in 1.000 x 103?
6. Express the sum of 1.23 x 105 and 4.5 x 104 in scientific notation with the correct number of significant figures.
7. What is the result of 0.0085/2.1? Express your answer with the correct number of significant figures.
8. How many significant figures are in 10,000 when it's written as an exact number?
9. Add 102.3 + 5.67 + 0.1. Express your result with the appropriate number of significant figures.
10. Convert 0.0350 km to meters, expressing your answer with the correct number of significant figures.
11. Calculate the area of a rectangle with length 4.56 cm and width 3.2 cm. Express your answer with the correct number of significant figures.
12. A cylindrical tank has a diameter of 1.50 m and a height of 3.0 m. Calculate its volume in cubic meters, expressing your answer with the correct number of significant figures. (Use π = 3.14)
13. You are given a rectangular wooden block and a metric ruler marked in millimeters. This means that the ruler's smallest division is 1 mm. You then measure the length, width, and height of the block using the ruler and record each measurement with the appropriate number of significant figures.
Length: 37.5 mm Width: 25.0 mm Height: 12.5 mm
a. Calculate the volume of the block using your measurements. Express the final answer with the correct number of significant figures.
b. The density of a substance is defined as being its mass divided by its volume. If the mass of the block is measured to be 15.23 g, calculate the density of the wood. Express your answer with the appropriate number of significant figures and units.
Textbook Assignment:
1. Answer question 17 in the Concept Items section of the Chapter Review for Chapter 1.
2. Answer questions 29, 29, and 35 in the Critical Thinking Items section of the Chapter Review for Chapter 1.