Physics Laboratory Experiments
8th Edition
ISBN: 9781285738567
Author: Jerry D. Wilson, Cecilia A. Hernández-Hall
Publisher: Cengage Learning
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Chapter 2, Problem 3ASA
What is the difference between measurement accuracy and precision? Explain the general dependence of these properties on the various types of errors.
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You are measuring the length of a tube using a ruler. Your actual measurement of the tube is 6 mm ± 1 mm. Compare the accuracy and precision of your measurement
compared to the expected measured value of 6.0 mm ± 0.1 mm
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Describe the precision of your measurement:
(Hint: Look at the number of decimal places in the measurement.)
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Chapter 2 Solutions
Physics Laboratory Experiments
Ch. 2 - Do experimental measurements give the true value...Ch. 2 - Distinguish between random (statistical) error and...Ch. 2 - What is the difference between measurement...Ch. 2 - What determines how many figures are significant...Ch. 2 - In expressing experimental error or uncertainty,...Ch. 2 - How could the function y = 3t2 + 4 be plotted on a...Ch. 2 - Read the measurements on the rulers in Fig. 2.9,...Ch. 2 - Were the measurements of the block in part (b) of...Ch. 2 - Referring to the dart analogy in Fig. 2.3, draw a...Ch. 2 - Prob. 4Q
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- Question 2: Complete the following Error Analysis The lengths of the sides of a rectangular box are measured using a ruler marked with a millimeter scale. W The measurements give the values length 83 mm, width 68 mm and height 23 mm. The uncertainty in each measurement is ±1 mm. Calculate, 1. The fractional uncertainty in the measurement of VOLUME is 2. Absolute uncertainty in the measurement of VOLUME in (mm³ ) isarrow_forward2.) A single reading taken with a meter stick for the length of a cylinder is 5.5 cm. What is the prsable percent error in the reading? 3.) The following readings were taken with a meter stick for the length of a cylinder: 5.5 cm, 5.3 cm, 5.4 cm, 5.5 cm and 5.6 cm. Calculate the standard deviation of the mean, the stand error and the probable percent error. 4.) How many significant figures should be given in reporting the length of the cylinder in question 3? 5.) If the radius of the cylinder in question 2 is 2.4 ± 0.2 cm and its mass is 32.6 ± 0.5 gm, what will be the probable percent error in the density of the cylinder? What will be the probable error in density? How many significant figures should be given in reporting the density? Conclusions?? 02 6) (figure3) 6a)Befer to Figure 3. Given a track length of 90 cm and a height difference of 18 cm, what is sin 6 02 01 Fig. 2 Z)(figure 2) plane (see Figure 2). Attach the diagram in question#8 below. What would be the acceleration given…arrow_forwardA marathon runner completes a 42.188-km course in 2 h, 35 min, and 39 s. There is an uncertainty of 28 m in the distance traveled and an uncertainty of 1 s in the elapsed time. (Give all answers to the appropriate number of significant figures. Note that uncertainties should be reported to one significant figure and percent uncertainties should be reported to two significant figures.) (a) Calculate the percent uncertainty in the distance. _________% (b) Calculate the percent uncertainty in the elapsed time. __________%arrow_forward
- Given that P = ". Find the maximum percentage error in calculating P 2/m if the percentage error in measuring m and n is 2% and 3%, respectively.arrow_forwardDetermine the absolute uncertainty for the calculated value in the following scenarios. Express as (computed result) ± (absolute uncertainty) (units). You measure the volume of a stainless steel sphere by placing it into a100 mL graduated cylinder with an uncertainty of 1 mL, with 20 mL ofwater initially. After the sphere settles, the graduated cylinder now reads22 mL. What is the volume with uncertainty? Please use the formula I posted ! Thank you!arrow_forwardWhat is “Random and Systematic Error”? Give an example for each one. What is “Standard deviation” and its formula? What data percent of XAverage ± σ, or XAverage ± 2σ, or XAverage ± 3σ might be the most reliable one?arrow_forward
- If the number of significant figures is 6, what is the value of the pre-specified Error(?s) Select one: O a 0.000005% O b. 0.0005% O c. 0.005% ০ d 0.00005%arrow_forward(a) What is the relationship between the precision and the uncertainty of a measurement? (b) What is the relationship between the accuracy and the discrepancy of a measurement?arrow_forwardModern instruments usually have digital readouts; the reading in the rightmost digit will sometimes fluctuate up and down among several values. What type of error is this? Explain its effect on a large data set.arrow_forward
- What is the percent error in the accuracy in the measured volume of the cube? Use the calculated value as the expected value. Round your answer to 2 digits.arrow_forwardWhat, roughly, is the percent uncertainty in the volume of a spherical beach ball of radius r = 0.8460.04 m?arrow_forwardWhich value of H do you consider to be least accurate? Give reasons for your answer and explain how the accuracy could have been improved.arrow_forward
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