# Math Practice for Physics ```Math Practice for Physics:
Name: __________________________
Part 1: Conversions
1. If a radio wave has a period of 1𝜇s, what is the wave’s period in seconds?
2. A hydrogen atom has a diameter of about 10 nm.
a.
Express this diameter in meters.
b.
Express this diameter in millimeters.
c.
Express this diameter in micrometers.
3. The distance between the sun and Earth is about 1.5 &times; 1011 m. Express this distance with an SI prefix
and in kilometers.
4. Convert 55 km/hour to m/s
( 1.6 km = 1 mile; 1 mile = 5,280feet). Show all steps
5. Convert 23 miles / hour to km/s
Part 2 - SIGNIFICANT FIGURES
Determine how many significant figures are in each of the following measurements:
6. 0.00540700 mm
9. 350980 g
7. 25.0080 kg
8. 4500.0 L ______________
10. 0.000082 mg
SIGNIFICANT FIGURES IN CALCULATIONS:
PROBLEMS – express the following calculations using the proper number of significant figures:
11. 129 kg/29.2 kg
14. 7.25 g+ 59.1g + 5.259 g
12. 31.8 m/45.0 m
13. 0.098 mm/45.4 mm
15. 52.1 g - 42.0 g
Part 3: Significant Figures in Measurements: Record each measurement to the correct number of significant figures.
a) ________ b) ________ c) _________
d
0
e
1
g
f
2
3
4
meters, m
G r a d u a t e d
A
C y l i n d e r
B
d) ______ e) _______ f) ________ g) ______
P r a c t i c e
C
D
E
F
50
100
10
500
100
10
40
80
9
400
90
9
30
60
8
300
80
8
20
40
7
200
70
7
10
20
6
100
60
6
(you may assume all cylinders measure in mL)
maximum capacity of cylinder
smallest division =
volume shown above
(with correct sig figs) =
A
B
C
D
E
F
```