College

We appreciate your visit to Q1 How many significant figures are in the following measurement 0 0009 A 1 B 5 C 4 D 3 Q2 Three unique samples are. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!

**Q1:** How many significant figures are in the following measurement: 0.0009?

A. 1
B. 5
C. 4
D. 3

---

**Q2:** Three unique samples are weighed on different scales at separate laboratories across the country. The first has a weight of 31.2 lbs, the second sample weighs 38.02 lbs, while the third measures 45 lbs. What is the total combined weight of all these samples?

A. 114.22 lbs
B. 110 lbs
C. 114 lbs
D. 114.2 lbs

---

**Q3:** A track coach measures the 100-meter time of a track athlete. The runner completes the distance in 11.5 seconds. If the stopwatch has an uncertainty of 1.7%, what is the amount of uncertainty in the time?

A. 11.5 s ± 0.19 s
B. 11.5 s ± 0.20 s
C. 11.5 s ± 0.1955 s
D. 11.5 s ± 0.196 s

---

**Q4:** The speed of a bullet train is measured to be 312.0 mph ± 3.9 mph. What is the percent uncertainty in this measurement?

A. 1.3%
B. 1.2%
C. 1.25%
D. 0.0125%

Answer :

#1

  • 0.0009

3zeros hence significant figures will be 4

#2

[tex]\\ \sf\longmapsto 31.2+38.02+45[/tex]

[tex]\\ \sf\longmapsto 114.22lbs[/tex]

#3

[tex]\\ \sf\longmapsto 11.5s\pm 0.19s[/tex]

  • Round it up

[tex]\\ \sf\longmapsto 11.5s\pm 0.20s[/tex]

#4

0.0125%

Thanks for taking the time to read Q1 How many significant figures are in the following measurement 0 0009 A 1 B 5 C 4 D 3 Q2 Three unique samples are. We hope the insights shared have been valuable and enhanced your understanding of the topic. Don�t hesitate to browse our website for more informative and engaging content!

Rewritten by : Barada

Answer:

I do apologize but I can't figure out Q 2 , 3 but

Q 1 is 1

Q4 is 0.0125%

so sorry