Vacuum
Examples

Vacuum

Section Title: Examples
Table Section Text: None

Pressure (Pa or kPa)	Pressure (Torr, atm)	Mean Free Path	Molecules per cm3

Standard atmosphere, for comparison	101.325 kPa	760 torrs (1.00 atm)	66 nm	2.5×1019

Intense hurricane	approx. 87 to 95 kPa	650 to 710

Vacuum cleaner	approximately 80 kPa	600	70 nm	1019

Steam turbine exhaust (Condenser backpressure)	9 kPa

liquid ring vacuum pump	approximately 3.2 kPa	24 torrs (0.032 atm)	1.75 μm	1018

Mars atmosphere	1.155 kPa to 0.03 kPa (mean 0.6 kPa)	8.66 to 0.23 torrs (0.01139 to 0.00030 atm)

freeze drying	100 to 10	1 to 0.1	100 μm to 1 mm	1016 to 1015

Incandescent light bulb	10 to 1	0.1 to 0.01 torrs (0.000132 to 1.3×10−5 atm)	1 mm to 1 cm	1015 to 1014

Thermos bottle	1 to 0.01	1×10−2 to 1×10−4 torrs (1.316×10−5 to 1.3×10−7 atm)	1 cm to 1 m	1014 to 1012

Earth thermosphere	1 Pa to 1×10−7	10−2 to 10−9	1 cm to 100 km	1014 to 107

Vacuum tube	1×10−5 to 1×10−8	10−7 to 10−10	1 to 1,000 km	109 to 106

Cryopumped MBE chamber	1×10−7 to 1×10−9	10−9 to 10−11	100 to 10,000 km	107 to 105

Pressure on the Moon	approximately 1×10−9	10−11	10,000 km	4×105

Interplanetary space	11

Interstellar space	1

Intergalactic space	10−6

Sentence(s)

Atmospheric pressure is standardized at 101.325 kPa (760 Torr).

final_sentence: Atmospheric pressure is standardized at 101.325 kPa (760 Torr).