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April 21, 2014

Homework Help: Physics - correction - significant digits

Posted by Anonymous on Monday, February 4, 2008 at 11:37pm.

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
=

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