Can you check my answers please?
1. A student measures the volume of a liquid and finds it to be 40ML. How many significant figures are in the measurement?
1.
2**
3
4
2.Calculate the area, with the appropriate number of significant figures, of a rectangular room that is 14.10 by 15.0m long.
212 m2**
211.5 m2
29.1m
29.10 m
thank you :))
1.D
2.A
3.A
4.B
5.D
100% connexus :)
Lesson 7: Mathematics in Science
Science 8 A Unit 1: Introduction to Science 8
@Mrsue
#1. only 1 significant digit. Trailing zeros do not count.
See http://www.rpi.edu/dept/phys/Dept2/yesterday/APPhys1/sigfigs/sigfig/node152.html
#2. is correct
Anonymous is right
thank you Anonymous 100% :D
Thanks, Anonymous!
Sure, I can check your answers for you!
1. A student measures the volume of a liquid and finds it to be 40 mL. How many significant figures are in the measurement?
To determine the number of significant figures in a measurement, you need to look at the digits that are present. Any non-zero digit or any zero between two non-zero digits is considered significant. In this case, since there are two non-zero digits (4 and 0), the measurement has 2 significant figures. So your answer: 2, is correct.
2. Calculate the area, with the appropriate number of significant figures, of a rectangular room that is 14.10 by 15.0 m long.
To calculate the area of a rectangle, you multiply the length by the width. In this case, the length is given as 14.10 m and the width as 15.0 m.
To determine the number of significant figures in the answer, you need to consider the number with the least number of significant figures. In this case, the width (15.0 m) has 3 significant figures, while the length (14.10 m) has 4 significant figures. When multiplying, you need to use the same number of significant figures as the measurement with the fewest. So the answer, rounded to the appropriate number of significant figures, will also have 3 significant figures.
The correct answer is 212 m², so your answer: 212 m², is correct.
Great job! Your answers are correct. Let me know if you have any more questions or need further assistance.