Physics 11th Grade

1. How many significant figures are in the following

a. 100000007 9 significant figures b. 0.000000010 2 significant figures c. 9.02000 3 significant figures d. 100000 1 significant figures

2. Multiply or divide the following and give the answer in significant figures

a. 35.2 x .0071= 2.4992 =2.50 b 2000 divided by 3.33= 600.6006006 = 600 c 45.5 x 2.22 x 10= 1010.1 = 1000

3. Add or subtract the following place answer in sig figs. (I showed my work in my notebook)

a. 23.0078 - 3.20= 19.8078 = 19.80 b. 23.967 + 9.1= 33.067 = 33.0

4. You have 3 observations for the time a car moves 400 meters. They are 4.4 seconds, 3.9 seconds and 4.0 seconds. Determine the relative deviation

4.4+3.9+4.0= 12.3 (average mean)
Da1: 4.4-12.3= 7.9
Da2: 3.9-12.3=8.4
Da3: 4.0-12.3=8.3
Da (average)= 7.9+8.4+8.3= 24.6
Dr: 24.6/3= 8.2
Dr: 8.2/12.3= 0.66 * 100= 66.66

5. What is the order of magnitude of the following numbers a, 6.02 x 10(5) 6.02x10(6) b. 9.9 x 10 (minus 4) 9.9x10(minus 4) c. 4.3 x 10 (3) 4.3x10(4)

6. Write under what circumstances would you use relative error instead of relative deviation
We use relative error to make sure experiments calculations are precise. We use relation deviation to find the approximate calculations of an