unit conversion tip sheet 2020 - ontario tech university
TRANSCRIPT
Radians are dimensionless
180°= 240°
Unit conversionMetric system
SI units Common combinations of the SI units
Converting between degrees and radians
aatto-
Example: Convert the following:a) Convert 5.2 mg to kg
a) Convert 45° to radians
b) Convert π rad to degrees
b) Convert 0.00071 km to µm
(5.2 mg) = 5.2 x 10-6 kg 1 g
103 mg
10-18 10-15 10-12 10-9 10-6 10-3 10-2 10-1 100 101 102 103 106 109 1012
ffemto-
ppico-
nnano-
μmicro-
mmilli-
ccenti-
ddeci-
dadeka-
hhecto-
kkilo-
Mmega-
Ggiga-
Ttera-Base Unit
1 kg103 g
(7.1 x 10-5km) = 7.1 x 104μm 103 m1 km
106 μm 1 m
Example: Convert the following to appropriate SI Units:
Example: Perform the following conversions:
a) 10 km/h b) 450 cm2
= 2.81 h3600 s
kmh
π rad180°
45°
π rad
=
π rad
π rad4
43
43
1000 m m1 km s (450 cm2) = 0.045 m21 m
100 cm1 m
100 cm
QUANTITY UNIT SYMBOL
Length Metre
QUANTITY UNIT
Area
Volume
Velocity
Acceleration
m3
m/s
m2
m/s2
SYMBOL
J ,
NNewton
Joule
DERIVED QUANTITY NAME
Work ( )
Force ( )
EQUIVALENT SI UNITS
WWattPower ( )
AAmpere
m
180° = π rad π4
3π4
5π4
7π4
3π2
π3
π2
π
π2π0
6
10
Mass Kilogram kg
Time Second s
Electric charge
Temperature
Amount of substance
Kelvin
Mole
Coulomb
K
mol
C
Current ( )
,
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