Podcast
Questions and Answers
A student is determining the density of a sugar solution. Their experimental result of 1.25 g/cm³ is compared to an expected value of 1.30 g/cm³. Which statement best describes the accuracy of the student's result?
A student is determining the density of a sugar solution. Their experimental result of 1.25 g/cm³ is compared to an expected value of 1.30 g/cm³. Which statement best describes the accuracy of the student's result?
- The experimental result is reasonably accurate. (correct)
- The experimental result is neither accurate nor precise.
- The experimental result is very accurate, but not very precise.
- The experimental result is very precise, but not very accurate.
A rectangular block has dimensions of 2.0 cm x 3.5 cm x 5.0 cm. What is the volume of the block, expressed with the correct number of significant figures?
A rectangular block has dimensions of 2.0 cm x 3.5 cm x 5.0 cm. What is the volume of the block, expressed with the correct number of significant figures?
- 35 cm³ (correct)
- 35.00 cm³
- 30 cm³
- 35.0 cm³
How many of the following measurements contain three significant figures: 102, 0.456, 1.00, 1000, 45.0, 0.002?
How many of the following measurements contain three significant figures: 102, 0.456, 1.00, 1000, 45.0, 0.002?
- Four (correct)
- Two
- Three
- Five
A student measures the length of a metal bar using a ruler. The marks on the ruler are every 0.1 cm. The end of the bar falls between the marks at 12.4 cm and 12.5 cm. Which of the following is the best measure of the length of the metal bar?
A student measures the length of a metal bar using a ruler. The marks on the ruler are every 0.1 cm. The end of the bar falls between the marks at 12.4 cm and 12.5 cm. Which of the following is the best measure of the length of the metal bar?
A graduated cylinder contains water. The bottom of the meniscus in the cylinder is exactly between the 48 mL mark and the 49 mL mark. What is the correct reading of the volume, taking significant figures into account?
A graduated cylinder contains water. The bottom of the meniscus in the cylinder is exactly between the 48 mL mark and the 49 mL mark. What is the correct reading of the volume, taking significant figures into account?
What is the correct conversion of 25 cm² to m²?
What is the correct conversion of 25 cm² to m²?
When converting 1000 cm³ to m³, what is the resulting volume?
When converting 1000 cm³ to m³, what is the resulting volume?
Which of the following statements about conversion factors is incorrect?
Which of the following statements about conversion factors is incorrect?
What happens to the conversion factor when changing from a squared to a cubic unit?
What happens to the conversion factor when changing from a squared to a cubic unit?
What is the correct conversion factor for converting 1 meter to centimeters?
What is the correct conversion factor for converting 1 meter to centimeters?
A student needs to convert 16.0 km² to m². Utilizing the correct conversion factor, what should the student do?
A student needs to convert 16.0 km² to m². Utilizing the correct conversion factor, what should the student do?
In the conversion factor for liters to cubic centimeters, what is the numerical value of 1 liter?
In the conversion factor for liters to cubic centimeters, what is the numerical value of 1 liter?
How should the conversion factor be addressed when the unit is raised to a power of n?
How should the conversion factor be addressed when the unit is raised to a power of n?
While converting units, what is the most critical step to ensure correctness?
While converting units, what is the most critical step to ensure correctness?
Flashcards
Accuracy
Accuracy
The closeness of a measurement to the true value.
Significant figures
Significant figures
The number of significant digits in a measurement, indicating the precision of the measurement.
Density
Density
The ratio of a substance's mass to its volume.
Graduated cylinder
Graduated cylinder
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Ruler
Ruler
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Conversion factor
Conversion factor
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Unit conversion
Unit conversion
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Converting units raised to a power
Converting units raised to a power
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Conversion factor equals 1
Conversion factor equals 1
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Canceling units
Canceling units
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Power up the conversion factor
Power up the conversion factor
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Conversion factor & units
Conversion factor & units
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Area units conversion
Area units conversion
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Volume units conversion
Volume units conversion
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Order of operations
Order of operations
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Study Notes
Question 1
- A student performs an experiment to determine the density of a sugar solution.
- The obtained results are 1.79 g/mL, 1.71 g/mL, 1.93 g/mL, and 1.72 g/mL.
- The actual value for the density of the sugar solution is 1.75 g/mL.
- The student's results are precise but not accurate.
Question 2
- Calculate the volume in cubic centimeters (cm3) given a volume in cubic millimeters (mm3).
- The conversion is 2.83 x 107 mm3 = 28.3 cm3
Question 3
- Information on Question 3 is missing.
Question 5
- A metal bar is measured using a ruler.
- The correct reading is 15.6 cm.
Question 6
- The level of liquid in a graduated cylinder is measured.
- The correct reading is 13.2 mL.
Question 7
- A student performs an experiment to determine the density of a sugar solution.
- The obtained results are 1.69 g/mL, 1.66 g/mL, 1.91 g/mL, and 1.72 g/mL.
- The actual value for the density is 1.75 g/mL.
- The student's results are neither precise nor accurate.
Question 8
- A calculation involving multiplication is given.
- The result, with the correct number of significant figures, is 1.21 x 10-7.
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Description
Test your understanding of measurement accuracy and precision in scientific experiments. This quiz covers concepts such as density determination, unit conversion, and measuring liquid levels using graduated cylinders and rulers. Challenge yourself with practical scenarios and evaluate your comprehension of measurement techniques.
