**Unformatted text preview: **Table 1.5 Prefixes Used in the Metric System and with SI Units
lowme
Prefix
Abbreviation
Meaning
Example
derived from bagth
Peta
10'
1 petawatt (PW)
= 1 X 10's watts'
( mx m xmam )
Tera
1012
1 terawatt (TW)
1 X 10' watts
. Idm' = 1L
Giga
G
gigawatt (GW)
= 1 X 10' watts
Meg
M
10
I megawatt (MW) = 1 x 10 watts
. Icms = 1mL
Kilo
k
1 kilowatt (kW)
1 X 10' watts
Deci
d
10-
1 deciwait (dW)
= 1 x 10" watt
Temperature
Centi
C
1 centiwatt (cW)
= 1 X 10 * watt
. hot scold
Milli
m
I milliwatt (mW)
- 1 X 103 watt
i direction which
Micro
1 microwatt (uW) = 1 X 10 6 watt
heat will flow
Nano
I nanowatt (nW)
= 1 X 10 % watt
Pico
10-12
1 picowatt (PW)
= 1 X 10 12 waft
Femto
10 7 13
femtowatt ((W)
= 1 X 10 15 watt
Atto
10-18
attowatt (aw)
=1 X 10-15 watt
Density
Zepto
10-21
I zeptowatt (zW)
= 1 X 10 20 watt
. mass a substance has
"The watt (W) is the SI unit of power, which is the rate at which energy is either generated
per unit of volume
or consumed. The SI unit of energy is the joule (): 1 ] = 1 kg . m' /s and 1 W = 1]/s.
"Greek letter mu, pronounced "mew."
1) = m / V
Ex: a sample has a mass of 3. So grams
vol of Onceme. Density?
fepert
work : D = 3- sheq
= 3 45 7 / ml
0.974 ml
Ethanol has density of . 79 glimG. How much
space will 0.SO grams of ethanol take yo?
2 0 .S
2.79
V20.43 L
mads of iran wbe if length is 7 5 cm?
density of ison is 7. gog/ 52
cube
work ? V = ( xWX h v z o . 7 5 x 0 . 7 5 x 0 . 78 = 0 . 42Q25
c'm
1 cm 3 = 1 ml
cM
0 . 42 m L
7.9 = 0 . 72
M = 3 . 3 9...

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