# Physics - correction - significant digits

posted by .

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 -

2 e,f n are wrong
3. the answers shown are correct, but several are blank.

• Physics - correction - significant digits -

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 -

no because i would not quit

## Similar Questions

1. ### Chemistry

please check my answers for the following questions. 1) when a measurement that has six significant digits is divided by a measurement that has three significant digits, how many significant digits should the answer have?
2. ### Significant Digits

(2.7 x 10^2) x (4.23 x 10^2) PLEASE YOU SIGNIFICANT DIGITS!!! thx
3. ### Math

Expressed to the correct number of significant figures, the sum of two masses is 445.2 grams. WHich two masses produce this answer?
4. ### Physics

Calculate the answer for the following question and state the answer with the correct certainty and units. Given the values of b and h, find A. b=3.2 cm, h=10.1 cm A=1/2bh The answer is 16 cm^2, which was rounded to two significant …
5. ### chemistry

this is over significant digits. -Indicate how many significant figures are in each of the following measurements: e) 4.0 X 10-5 kg i got 1 significant digit, but i'm not sure it if it's right... (& i can't ask my teacher, the situation …
6. ### physics

A hole in an aluminum plate has a diameter of 1.465 cm at 22.80° C. (a) What is the diameter of the hole at 199.0° C (to four significant digits)?
7. ### Physics - bobpursely

State the number of significant figures. 1) 809 Answer : 3 2) 0.0060 Answer : 5?
8. ### Physics

Talking about significant figures, my Physics textbook lists 5 rules for determining significant figures. 1) All nonzero digits are significant. 2) Zeros to the right of nonzero digits in a number containing a decimal point are significant. …
9. ### math (significant digits)

(3.x10^-2) + (0.2) round to significant digits required
10. ### physics

round of the following digits- 3.65*105(upto are place of decimal) 0.882026(upto three significant figures) 311.299(upto four significant figures) 4.783(upto two significant figures)

More Similar Questions