The megapascal (MPa) is a unit of pressure that is often used in a variety of scientific and engineering calculations, especially in materials science. One fascinating aspect of the megapascal is how it bridges different disciplines, such as geology, where it helps measure the strength of rocks, and civil engineering, where it is crucial for understanding the stress in structures. Interestingly, 1 MPa is equivalent to the pressure exerted by a weight of about 10.2 metric tons on a single square meter, illustrating its significant impact compared to everyday pressures we encounter.
In the realm of meteorology, pressures measured in MPa can indicate catastrophic weather conditions, as atmospheric pressure is usually measured in hectorpascals due to its lower scale. Also noteworthy is the use of MPa in automotive engine performance, where it assesses combustion forces, underlying the importance of this unit in ensuring both vehicle efficiency and safety. Thus, the megapascal is vital across varied fields, reflecting the diverse applications of pressure measurement in modern technology and natural phenomena.
The millimeter of mercury (mmHg) is a unit of pressure traditionally used in medicine and meteorology, and its history dates back to the barometer invention by Evangelista Torricelli in 1643. Often, it is associated with measuring blood pressure and intraocular pressure, representing the pressure exerted by a column of mercury precisely 1 millimeter high. This fascinating unit highlights the interplay of physics and medicine, reflecting both the force of blood circulating against vessel walls and the atmospheric pressure’s effects on our weather systems.
Interestingly, mmHg is one of the few units still officially sanctioned for use with SI (International System of Units) under specific legal and medical contexts, underscoring its importance over centuries. Despite the global shift towards using Pascals for pressure, mmHg remains ingrained in clinical settings because of its historical usage and direct relation to human physiology. Its origins and continued use illustrate how historical scientific instruments still influence modern practices.
Megapascals | Millimeters of mercury |
---|---|
0
MPa
|
0
mmHg
|
1
MPa
|
7500.63755
mmHg
|
2
MPa
|
15001.27511
mmHg
|
3
MPa
|
22501.91266
mmHg
|
4
MPa
|
30002.55022
mmHg
|
5
MPa
|
37503.18777
mmHg
|
6
MPa
|
45003.82533
mmHg
|
7
MPa
|
52504.46288
mmHg
|
8
MPa
|
60005.10043
mmHg
|
9
MPa
|
67505.73799
mmHg
|
10
MPa
|
75006.37554
mmHg
|
11
MPa
|
82507.0131
mmHg
|
12
MPa
|
90007.65065
mmHg
|
13
MPa
|
97508.2882
mmHg
|
14
MPa
|
105008.92576
mmHg
|
15
MPa
|
112509.56331
mmHg
|
16
MPa
|
120010.20087
mmHg
|
17
MPa
|
127510.83842
mmHg
|
18
MPa
|
135011.47598
mmHg
|
19
MPa
|
142512.11353
mmHg
|
20
MPa
|
150012.75108
mmHg
|
21
MPa
|
157513.38864
mmHg
|
22
MPa
|
165014.02619
mmHg
|
23
MPa
|
172514.66375
mmHg
|
24
MPa
|
180015.3013
mmHg
|
25
MPa
|
187515.93885
mmHg
|
26
MPa
|
195016.57641
mmHg
|
27
MPa
|
202517.21396
mmHg
|
28
MPa
|
210017.85152
mmHg
|
29
MPa
|
217518.48907
mmHg
|
30
MPa
|
225019.12663
mmHg
|
31
MPa
|
232519.76418
mmHg
|
32
MPa
|
240020.40173
mmHg
|
33
MPa
|
247521.03929
mmHg
|
34
MPa
|
255021.67684
mmHg
|
35
MPa
|
262522.3144
mmHg
|
36
MPa
|
270022.95195
mmHg
|
37
MPa
|
277523.58951
mmHg
|
38
MPa
|
285024.22706
mmHg
|
39
MPa
|
292524.86461
mmHg
|
40
MPa
|
300025.50217
mmHg
|
41
MPa
|
307526.13972
mmHg
|
42
MPa
|
315026.77728
mmHg
|
43
MPa
|
322527.41483
mmHg
|
44
MPa
|
330028.05238
mmHg
|
45
MPa
|
337528.68994
mmHg
|
46
MPa
|
345029.32749
mmHg
|
47
MPa
|
352529.96505
mmHg
|
48
MPa
|
360030.6026
mmHg
|
49
MPa
|
367531.24016
mmHg
|
50
MPa
|
375031.87771
mmHg
|
51
MPa
|
382532.51526
mmHg
|
52
MPa
|
390033.15282
mmHg
|
53
MPa
|
397533.79037
mmHg
|
54
MPa
|
405034.42793
mmHg
|
55
MPa
|
412535.06548
mmHg
|
56
MPa
|
420035.70303
mmHg
|
57
MPa
|
427536.34059
mmHg
|
58
MPa
|
435036.97814
mmHg
|
59
MPa
|
442537.6157
mmHg
|
60
MPa
|
450038.25325
mmHg
|
61
MPa
|
457538.89081
mmHg
|
62
MPa
|
465039.52836
mmHg
|
63
MPa
|
472540.16591
mmHg
|
64
MPa
|
480040.80347
mmHg
|
65
MPa
|
487541.44102
mmHg
|
66
MPa
|
495042.07858
mmHg
|
67
MPa
|
502542.71613
mmHg
|
68
MPa
|
510043.35369
mmHg
|
69
MPa
|
517543.99124
mmHg
|
70
MPa
|
525044.62879
mmHg
|
71
MPa
|
532545.26635
mmHg
|
72
MPa
|
540045.9039
mmHg
|
73
MPa
|
547546.54146
mmHg
|
74
MPa
|
555047.17901
mmHg
|
75
MPa
|
562547.81656
mmHg
|
76
MPa
|
570048.45412
mmHg
|
77
MPa
|
577549.09167
mmHg
|
78
MPa
|
585049.72923
mmHg
|
79
MPa
|
592550.36678
mmHg
|
80
MPa
|
600051.00434
mmHg
|
81
MPa
|
607551.64189
mmHg
|
82
MPa
|
615052.27944
mmHg
|
83
MPa
|
622552.917
mmHg
|
84
MPa
|
630053.55455
mmHg
|
85
MPa
|
637554.19211
mmHg
|
86
MPa
|
645054.82966
mmHg
|
87
MPa
|
652555.46721
mmHg
|
88
MPa
|
660056.10477
mmHg
|
89
MPa
|
667556.74232
mmHg
|
90
MPa
|
675057.37988
mmHg
|
91
MPa
|
682558.01743
mmHg
|
92
MPa
|
690058.65499
mmHg
|
93
MPa
|
697559.29254
mmHg
|
94
MPa
|
705059.93009
mmHg
|
95
MPa
|
712560.56765
mmHg
|
96
MPa
|
720061.2052
mmHg
|
97
MPa
|
727561.84276
mmHg
|
98
MPa
|
735062.48031
mmHg
|
99
MPa
|
742563.11787
mmHg
|
100
MPa
|
750063.75542
mmHg
|
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