1.) The document provides 10 examples of unit conversions between metric and other systems of units. It converts between meters/seconds and km/h, meters and nanometers, nanometers and femtometers, amps and milliamps, hours and seconds, kilograms/meters cubed and micrograms/cubic centimeter. 2.) The conversions use dimensional analysis and involve multiplying or dividing by powers of 10 to account for the different metric prefixes like milli, micro, and nano. 3.) Examples include converting 10 m/s to km/h, 0.000000007 m to nanometers, 1.5x10-5 A to milliamps, and 19,300 kg/m

1. ก
ก F
.
F (ก F 7)
1.) . . .4/6 18
2.) . . .4/6 20
3.) . . F F .4/6 24
4.) . . F .4/6 26
5.) . . ก .4/6 29

2. ก
1.) F F 10 m/s F F F ก F
F
F F= ×
10 m/s = km/h
= 36000 × 10 km / h
= 3.6 × 104 × 10 km / h
= 36 km / h
2.) 0.000000007 F F F
0.000000007 m = 7 × 10-9 m
= 7 nm
3.) 5 F F F
5 nm = 5 × 10-9 m
= 5× fm
= 5 × 106 fm
4.) ก 1.5 × 10-5 F F F F F
1.5 × 10-5 A = 1.5 × 10-5 × mA
= 1.5 × 10-2 mA

3. 5.) 3 Fก
3 = 3 × 24
= 72
= 72 × 60
= 4320
= 4320 × 60
= 259,200
6.) F 120 F Fก กก
120 = 1.2 × 102
= 1.2 × 102 × ก
= 1.2 × 10-8 ก
7.) ก 9.1 × 10-31 ก ก F F F ก
9.1 × 10-31 ก ก = 9.1 × 10-31 × pg
= 9.1 × 10-16 pg
8.) 35 F F F
35 mm2 = 35 × ( )2 cm 2
= 35 × cm2
= 35 × 10-2 cm2

4. 9.) 15 ก กF F F F ก กF
3
3
15 m = 15 × ( ) mm3
= 15 × mm3
= 1.5 × 1010 mm3
10.) F 19,300 ก ก F ก กF F F F ก
F ก กF
19,300 kg/m3 = 1.93 × 104 kg/m3
.
= µg/cm3
.
= µg/cm3
.
= µg/cm3
= 1.93 × 107 µg/cm3
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