Metric prefixes
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Metric Prefixes. Value: Prefix: P ron: Symbol: 10 18 exa ex a E 10 15 peta pet a P 10 12 tera tare a T 10 9 giga jig a G 10 6 mega meg a M 10 3 kilo key lo k 10 2 hecto hek toe h 10 deka dek a da . Metric Prefixes. Value: Prefix: P ron: Symbol:

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Metric prefixes
Metric Prefixes

Value:Prefix:Pron:Symbol:

1018 exa ex a E

1015 peta pet a P

1012 tera tare a T

109 giga jig a G

106 mega meg a M

103 kilo key lo k

102 hecto hek toe h

10 deka dek a da


Metric prefixes1
Metric Prefixes

Value:Prefix:Pron:Symbol:

10-1 deci dec i d

10-2 centi cent I c

10-3 milli mill I m

10-6 micro my kro 

10-9 nano nan o 

10-12 pico pec o 

10-15 femto fem to f


Frequencies and wavelengths

Frequencies and Wavelengths

f: (Hz):(m)Relevant Dim:

 1 300 M

 10 30 M

 100 3 M Earth Diam.

 1 k 300 k

 10 k 30 k Mnt. Everest

 100 k 3 k

Radio Waves


Frequencies and wavelengths1
Frequencies and Wavelengths

f: (Hz):(m)Relevant Dim:

  • M 300 m Redwool Tree

  • M 30 m

    100 M 3 m

  • G 300 mm Hydrogen Line

    10 G 30 mm

    100 G 3 mm

    Radio Waves


Frequencies and wavelengths2
Frequencies and Wavelengths

f: (Hz):(m)Relevant Dim:

  • T 300 m Bacterium

  • T 30 m

    100 T 3 m

    Infrared

  • P 300 m Virus Visible

  • P 30 m UV

  • P 3 m X-Rays


Frequencies and wavelengths3
Frequencies and Wavelengths

f: (Hz):(m)Relevant Dim:

  • E 300 m Atom X-Rays

    10 E 30 m X-Rays

    100 E 3 m Gama Rays

  • 1021 300 m Gama Rays

    10 1021 30 m Gama Rays

    100 1021 3 m Gama Rays


Radio frequency band names
Radio Frequency Band Names

Name:Freq:Use:

ELF 3-30 Hz

SLF 30-300 Hz Power Grids

ULF 300-3000 Hz

VLF 3-30 kHz Submarines

LF 30-300 kHz Beacons

MF 300-3000 kHz AM Broadcast


Radio frequency band names1
Radio Frequency Band Names

Name:Freq:Use:

HF 3-30 MHz Shortwave

VHF 30-300 MHzFM, TV

UHF 300-3000 MHz TV, LAN, Cellular

SHF 3-30 GHz Radar, GS Sat, data

EHF 30-300 GHz Radar, Automotive


Problem
Problem

What is light-year distance?

60 x 60 x 24 x 365 x 3.0 x 108 = 9.46 x 1015 m


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