# SI Units in Physics

```SI Units in Physics
Quantity
Length
Name:________________
SI unit
Symbol
Mass
Time
Length
The unit of length is ________________
&sect; 10 mm = __________ cm
&sect;
100 cm = __________ m
&sect;
1000 m = ___________ km
&sect;
1 micrometer = __________ m
&sect;
1 nanometer =_________m
Standard Notation/Scientific Notation/Standard Form
Large Numbers
5 000 000 can be written as 5 x 106.
5 x 106
-
5 multiplied by 10 six times
5 x 10 x 10 x 10 x 10 x 10 x 10
Another way of looking at this is as follows:
Firstly, insert a decimal point after the first number from the left.
5.0 x 106 -
5000000.0
the decimal point moves to the right 6 places
82 000 000 000 000 000 can be written as 8.2 x 1016.
8.2 x 1016
-
8.2 multiplied by 10 sixteen times
- 8.2 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10
Another way of looking at this is as follows:
Firstly, insert a decimal point after the first number from the left.
8.2 x 1016
-
82000000000000000.0
the decimal point moves to the right 16 places
82 000 000 000 000 000 can also be written as 0.82 x 1017or 82 x 1015.
Convert the following numbers into Scientific Notation form.
(a)
5500
x 10
(b)
7900000
x 10
(c)
960000
x 10
(d)
120
x 10
(e)
6100000000
x 10
(f)
47000
x 10
(g)
8400
x 10
(h)
300000000
x 10
(i)
56000
x 10
(j)
28000000
x 10
Prefixes in Physics
Prefix
Symbol
Multiples of power
_____________
G
109
_____________
M
106
_____________
K
103
_____________
m
10-3
_____________
&micro;
10-6
_____________
n
10-9
x 103
x 10-3
```