Number 30,000

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 [Biology]  The number of genes in a human being: 30,000-40,000.

 

[EECS]  30K(W) is one of standard numerical values for resistors (of tolerance class 5%).

 

[History] Tennessee is commonly known as the Volunteer State since 1847, when the governor called for 2,800 volunteers for the Mexican War and about 30,000 men responded.

 

[Science]  Frequency Ranges

Range

Names

Uses

3 Hz -

300 Hz

Extremely Low Frequency (ELF)

Telegraph

300 Hz -

3 KHz

Voice Frequency (VF)

Telephone Circuitry

3 KHz -

30 KHz

Very Low Frequency (VLF)

High Fidelity

30 KHz- 300 KHz

Low Frequency (LF)

Maritime Mobile

300 KHz -

3 MHz

Medium Frequency (MF)

Navigational Radio, Land-maritime Mobile

3 MHz -

30 MHz

High Frequency (HF)

Maritime, Aeronautical, Amateur Radio

30 MHz -

300 MHz

Very High Frequency (VHF)

Maritime, Meteorological Communication, Television

300MHz -

3 GHz

Ultra High Frequency (UHF)

Television, Military, Low Range Radar

3 GHz -

30 GHz

Super High Frequency (SHF)

Space, Satellite, Microwave

30 GHz -

300 GHz

Extremely High Frequency (EHF)

Radio Astronomy

 

[Trivia] Chili Heat Scale

Scoville Units

Chili Varieties

100,000 – 300,000

Habanero

50,000 – 100,000

Chiltepin, Thai

30,000 – 50,000

Pequin

15,000 – 30,000

De Arbol, Japones

5,000 – 15,000

Serrano, Pasilla de Oaxaco

2,500 – 5,000

Jalapeno, Guajillo, Chilpotle, Dried Green

1,500 – 2,500

NM Pods-Hot, Cascabel, Chihuacle Negro

1000 – 1,500

Ancho, Pasilla, Negro

500 – 1,000

Analeim, NM Pods-Mild, Mulato

100 – 500

Cherry

0 – 100

Bells, Pimento, Cubanelle