英文版 的

题目

英文版 的
1 A piece of wood has a labeled length calue of 76.49 cm.You measure its length three times and record the following data:76.48cm 76.47cm and 76.59cm.How many significant figures do these measurements have?
2Are the measurements in problem 39 accurate?Are they precise?Explain your answers.
3Calculate the percent error for each measurement in problem 39
4Round 76.51cm to two significant figures.Then round your answer to one significant figure.
5 Which of these measurements was made with the most precise measuring device:8.1956m,8.20m,or 8.196m?Explain you answer.
6Write an expression for the quantity 506000 cm in which it is clear that all the zeros are significant
最好中英文双解哈 答的好分数 会多给的

答案

1. 76.48cm has 4 significant figures 76.47cm has 4 significant figures 76.59cm has 4 significant figures2. the measurements in problem 39 is not accurate because it is off by 1mm ~ 10 mm; they are...