The torr is a unit of pressure named after the Italian physicist Evangelista Torricelli, who invented the barometer in the 17th century. It is defined as 1/760th of an atmosphere, approximating the pressure exerted by a one-millimeter column of mercury at 0 degrees Celsius. What makes the torr particularly interesting is its practical use in fields like vacuum technology and weather forecasting, where precise measurements of atmospheric pressure are crucial.
The legacy of Torricelli’s work is integral to meteorology and physics, as it opened paths for understanding atmospheric pressure. Beyond scientific circles, the torr is a reminder of human ingenuity in unraveling atmospheric mysteries and continues to play a vital role in today’s scientific advancements.
The kilopound per square inch (ksi) is a unit of pressure that is not as commonly encountered as its smaller counterpart, pounds per square inch (psi). However, it plays a crucial role in engineering and materials science, particularly in the United States, where it is often used to express the tensile strength and yield strength of materials like steel. One ksi is equal to 1,000 psi, making it a convenient way to express large values of pressure or stress without cumbersome zeros.
Interestingly, ksi is commonly used in the context of measuring the mechanical properties of metals, especially in aerospace and automotive industries. These are fields where precise and robust materials are essential for safety and performance. For instance, typical structural steel can have a yield strength on the order of 50 ksi, underscoring the immense stress materials can withstand in such applications. Understanding these units helps engineers ensure that the materials used can handle the demanding conditions they face.
Torr | Kilopound per square inch |
---|---|
0
torr
|
0
ksi
|
10
torr
|
0.000193368
ksi
|
20
torr
|
0.000386735
ksi
|
30
torr
|
0.000580103
ksi
|
40
torr
|
0.000773471
ksi
|
50
torr
|
0.000966838
ksi
|
60
torr
|
0.00116021
ksi
|
70
torr
|
0.00135357
ksi
|
80
torr
|
0.00154694
ksi
|
90
torr
|
0.00174031
ksi
|
100
torr
|
0.00193368
ksi
|
110
torr
|
0.00212704
ksi
|
120
torr
|
0.00232041
ksi
|
130
torr
|
0.00251378
ksi
|
140
torr
|
0.00270715
ksi
|
150
torr
|
0.00290052
ksi
|
160
torr
|
0.00309388
ksi
|
170
torr
|
0.00328725
ksi
|
180
torr
|
0.00348062
ksi
|
190
torr
|
0.00367399
ksi
|
200
torr
|
0.00386735
ksi
|
210
torr
|
0.00406072
ksi
|
220
torr
|
0.00425409
ksi
|
230
torr
|
0.00444746
ksi
|
240
torr
|
0.00464082
ksi
|
250
torr
|
0.00483419
ksi
|
260
torr
|
0.00502756
ksi
|
270
torr
|
0.00522093
ksi
|
280
torr
|
0.00541429
ksi
|
290
torr
|
0.00560766
ksi
|
300
torr
|
0.00580103
ksi
|
310
torr
|
0.0059944
ksi
|
320
torr
|
0.00618777
ksi
|
330
torr
|
0.00638113
ksi
|
340
torr
|
0.0065745
ksi
|
350
torr
|
0.00676787
ksi
|
360
torr
|
0.00696124
ksi
|
370
torr
|
0.0071546
ksi
|
380
torr
|
0.00734797
ksi
|
390
torr
|
0.00754134
ksi
|
400
torr
|
0.00773471
ksi
|
410
torr
|
0.00792807
ksi
|
420
torr
|
0.00812144
ksi
|
430
torr
|
0.00831481
ksi
|
440
torr
|
0.00850818
ksi
|
450
torr
|
0.00870155
ksi
|
460
torr
|
0.00889491
ksi
|
470
torr
|
0.00908828
ksi
|
480
torr
|
0.00928165
ksi
|
490
torr
|
0.00947502
ksi
|
500
torr
|
0.00966838
ksi
|
510
torr
|
0.00986175
ksi
|
520
torr
|
0.0100551
ksi
|
530
torr
|
0.0102485
ksi
|
540
torr
|
0.0104419
ksi
|
550
torr
|
0.0106352
ksi
|
560
torr
|
0.0108286
ksi
|
570
torr
|
0.011022
ksi
|
580
torr
|
0.0112153
ksi
|
590
torr
|
0.0114087
ksi
|
600
torr
|
0.0116021
ksi
|
610
torr
|
0.0117954
ksi
|
620
torr
|
0.0119888
ksi
|
630
torr
|
0.0121822
ksi
|
640
torr
|
0.0123755
ksi
|
650
torr
|
0.0125689
ksi
|
660
torr
|
0.0127623
ksi
|
670
torr
|
0.0129556
ksi
|
680
torr
|
0.013149
ksi
|
690
torr
|
0.0133424
ksi
|
700
torr
|
0.0135357
ksi
|
710
torr
|
0.0137291
ksi
|
720
torr
|
0.0139225
ksi
|
730
torr
|
0.0141158
ksi
|
740
torr
|
0.0143092
ksi
|
750
torr
|
0.0145026
ksi
|
760
torr
|
0.0146959
ksi
|
770
torr
|
0.0148893
ksi
|
780
torr
|
0.0150827
ksi
|
790
torr
|
0.015276
ksi
|
800
torr
|
0.0154694
ksi
|
810
torr
|
0.0156628
ksi
|
820
torr
|
0.0158561
ksi
|
830
torr
|
0.0160495
ksi
|
840
torr
|
0.0162429
ksi
|
850
torr
|
0.0164363
ksi
|
860
torr
|
0.0166296
ksi
|
870
torr
|
0.016823
ksi
|
880
torr
|
0.0170164
ksi
|
890
torr
|
0.0172097
ksi
|
900
torr
|
0.0174031
ksi
|
910
torr
|
0.0175965
ksi
|
920
torr
|
0.0177898
ksi
|
930
torr
|
0.0179832
ksi
|
940
torr
|
0.0181766
ksi
|
950
torr
|
0.0183699
ksi
|
960
torr
|
0.0185633
ksi
|
970
torr
|
0.0187567
ksi
|
980
torr
|
0.01895
ksi
|
990
torr
|
0.0191434
ksi
|
1000
torr
|
0.0193368
ksi
|
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