Averages follow the same rule. Suppose a car travels around a track three times. Your measurements for the three trials are 45.0 km/h, 48.21 km/h, and 47.024 km/h. Determine the average speed of the car. 45.0 + 48.21 + 47.024 = 140.234 140.234 + 3 = 46.744 66 Because the least precise measurement is 45.0 km/h, the answer can be precise only to the nearest one-tenth. Thus the correct answer, rounded off, is 46.7 km/h. Answer the following questions. 15. An experiment calls for 16.156 g of substance A, 28.2 g of substance B, 0.0058 g of substance C, and 9.44 g of substance D. a. How many significant digits are there in each measurement? A. B. b. What is the total mass of substances in this experiment? C. D. c. How many significant digits are there in the answer to part b? 16. Your lab partner has measured 16.50 mL of water. You accidentally tip over the graduated cylinder and spill some of the water. You etand the cylinder up and determine that there are 8.0 ml. of water left. a. Which measurement is more precise, your lab partner's or yours? Explain. b. How much water did you lose when you tipped over the graduated cylinder?

Averages follow the same rule. Suppose a car travels around a track three times. Your measurements for the three trials are 45.0 km/h, 48.21 km/h, and 47.024 km/h. Determine the average speed of the car. 45.0 + 48.21 + 47.024 = 140.234 140.234 + 3 = 46.744 66 Because the least precise measurement is 45.0 km/h, the answer can be precise only to the nearest one-tenth. Thus the correct answer, rounded off, is 46.7 km/h. Answer the following questions. 15. An experiment calls for 16.156 g of substance A, 28.2 g of substance B, 0.0058 g of substance C, and 9.44 g of substance D. a. How many significant digits are there in each measurement? A. B. b. What is the total mass of substances in this experiment? C. D. c. How many significant digits are there in the answer to part b? 16. Your lab partner has measured 16.50 mL of water. You accidentally tip over the graduated cylinder and spill some of the water. You etand the cylinder up and determine that there are 8.0 ml. of water left. a. Which measurement is more precise, your lab partner's or yours? Explain. b. How much water did you lose when you tipped over the graduated cylinder?

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter1: Units And Measurement

Section: Chapter Questions

Problem 33P: In SI units, speeds are measured in meters per second (m/s). But, depending on where you live,...

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