- Course Home Chp02 Chemistry And Measurements Interactive Activity Uncertainty In Measurement When Making Observation 1 (113.5 KiB) Viewed 21 times
- Course Home Chp02 Chemistry And Measurements Interactive Activity Uncertainty In Measurement When Making Observation 2 (106.7 KiB) Viewed 21 times
- Course Home Chp02 Chemistry And Measurements Interactive Activity Uncertainty In Measurement When Making Observation 3 (115.02 KiB) Viewed 21 times
Course Home <Chp02: Chemistry and Measurements Interactive Activity - Uncertainty in Measurement When making observations using two different instruments, it is important to keep in mind which tool will allow you to be the most accurate. The value with more significant digits often gives a more accurate reading The following activity allows you to find the diameter of a circle using two rulers with different markings Click on the image to explore this activity depicting the level of precision available for measurements taken using different scales. Click "Start" and measure the diameter of the blue circle by dragging it to one of the rulers, Enter the diameter using an appropriate number of significant figures and click "Submit." 1. Nonzero integers are always significant 2 Zeros between nonzero integers are always significant Start Ruler A Ruler B 1 cm 1 cm 2 cm 3 cm 3 cm 4 cm 1 0.000 4 cm www 0.000 After opening the activity, click the Start button, and then drag the circle over one of the rulers to find its diameter To count the number of significant figures in a value, use the following rules 2 of 21
Chp02: Chemistry and Measurements teractive Activity - Uncertainty in Measurement Part A In the activity, consider the ruler at the top as Ruler A and that at the bottom as Ruler B. Measure the diameter of the circle using Ruler A and Ruler B.Determine the number of significant figures, certain digits, and uncertain digits in Ruler A and Ruler B. Drag the appropriate labels to their respective targets. ▸ View Available Hint(s) two four Significant figures Certain digits Uncertain digits Ruler A two two two Ruler B two two two Reset 2 of 21 Help
Chp02: Chemistry and Measurements nteractive Activity - Uncertainty in Measurement Part C You are given a series of mathematical operations to perform and make a table including the calculated value as displayed on your calculator Mathematical operation Value displayed by calculator 1.073g +4.159g +1.02g+4.2g 1.073g * 1.02g 4.159g - 1.02g 4.159g/31.0341 4.2g/31.0341 10.4520 g 1.09446 g² 3.13900 g 0.134014 g 0.135335 g Sort the values displayed by the calculator according to the number of significant figures they should contain after you conduct the appropriate rounding of the values. Drag the appropriate items to their respective bins. ► View Available Hint(s) Reset Help