Posted by Anonymous on .
1) How many SD's?
a) 5.7 = 2 SD
b) 235.12 = 5 SD
c) 8.07 = 3 SD
d) 0.0032 = 2 SD
e) 0.0150 = 3 SD
f) 1.39x10^5 = 3 SD
g) 15.200 = 5SD
h) 1070 = 3 SD
2) Calculations  Please check the SDs
a) 15.3 + 25.03
= 40.33
= 40.3
b) 1200 + 63
= 1263
= 1300
c) 4.78  1.2
= 3.58
= 3.6
d) 243.1 + 15.2 + 3.75
= 262.05
= 262.1
e) 0.00170 + 0.02561
= 0.02731
= 0.0273
f) 4.0  3.99
= 0.01....
g) 2.7x82.7
= 223.29
= 220
h) 1074x3.21
= 3447.54
= 345
i) 0.022 x 9.7
= 0.2134
= 0.21
j) 0.0220 x 9.70
= 0.2134
= 0.213
k) 23.5/2.0
= 11.75
= 10
l) 0.1735/23
= 0.00754
= 0.0075
m) 18.2 x 27.9 x 1.3
= 660.114
= 660
n) 6.7x2.73/14.74
= 1.240
= 1.24
3) What units would result?
a) cm/s x s
= cm
b) m^2/s
=
c) m/s^2 x s
= m/s
d) m/s / s
=
e)g/cm^3
=
f) kg/m^2 / m
=

Physics  correction  significant digits 
bobpursley,
2 e,f n are wrong
3. the answers shown are correct, but several are blank. 
Physics  correction  significant digits 
drwls,
The reason (e) is incorrect is that, even though 0.00170 has three sig. digits, this is an addition problem, so only five places to the right of the decimal are required to match the significance of the 0.02561

football 
troy,
no because i would not quit