The millihertz (mHz) is a unit of frequency equal to one-thousandth of a hertz. While it sounds minuscule, frequencies at this scale have critical applications in science and technology. For example, the Earth’s rotation slows down over time, a phenomenon observable at the millihertz level. Measuring such tiny variations requires precise timing methods, akin to those used in atomic clocks that define international time standards.
In the realm of biology, certain very slow rhythms in the human body, such as some brainwave patterns, occur at millihertz frequencies. Understanding these subtle oscillations can provide insights into sleep cycles and neurological conditions. Millihertz frequencies are also employed in geophysics for monitoring seismic activities and gravitational wave detection, highlighting their significance in uncovering the mysteries of the universe.
Radian per second is a unit of angular velocity, commonly used in physics and engineering to describe rotational motion. One fascinating aspect of this unit is its connection to everyday observations, such as how the Earth rotates. The Earth spins at an angular velocity of about 7.29 x 10^-5 rad/s, a measurement that reflects both time and spatial dimensions harmoniously. Unlike degrees per second, which may vary with context, radians per second universally link angle to time via the constant π, making it a fundamental choice in scientific calculations.
Additionally, radian per second is pivotal in the world of oscillations and wave motion. For example, the frequency of a simple harmonic oscillator, like a swinging pendulum, can be directly analyzed using radians per second, shedding light on the intrinsic natural frequency of systems. These conversions are crucial in designing everything from clock mechanisms to advanced aerospace technology, demonstrating the profound impact this unit has across various fields.
Millihertz | Radians per second |
---|---|
0
mHz
|
0
rad/s
|
10
mHz
|
0.0628319
rad/s
|
20
mHz
|
0.125664
rad/s
|
30
mHz
|
0.188496
rad/s
|
40
mHz
|
0.251327
rad/s
|
50
mHz
|
0.314159
rad/s
|
60
mHz
|
0.376991
rad/s
|
70
mHz
|
0.439823
rad/s
|
80
mHz
|
0.502655
rad/s
|
90
mHz
|
0.565487
rad/s
|
100
mHz
|
0.628319
rad/s
|
110
mHz
|
0.69115
rad/s
|
120
mHz
|
0.753982
rad/s
|
130
mHz
|
0.816814
rad/s
|
140
mHz
|
0.879646
rad/s
|
150
mHz
|
0.942478
rad/s
|
160
mHz
|
1.00531
rad/s
|
170
mHz
|
1.06814
rad/s
|
180
mHz
|
1.13097
rad/s
|
190
mHz
|
1.19381
rad/s
|
200
mHz
|
1.25664
rad/s
|
210
mHz
|
1.31947
rad/s
|
220
mHz
|
1.3823
rad/s
|
230
mHz
|
1.44513
rad/s
|
240
mHz
|
1.50796
rad/s
|
250
mHz
|
1.5708
rad/s
|
260
mHz
|
1.63363
rad/s
|
270
mHz
|
1.69646
rad/s
|
280
mHz
|
1.75929
rad/s
|
290
mHz
|
1.82212
rad/s
|
300
mHz
|
1.88496
rad/s
|
310
mHz
|
1.94779
rad/s
|
320
mHz
|
2.01062
rad/s
|
330
mHz
|
2.07345
rad/s
|
340
mHz
|
2.13628
rad/s
|
350
mHz
|
2.19911
rad/s
|
360
mHz
|
2.26195
rad/s
|
370
mHz
|
2.32478
rad/s
|
380
mHz
|
2.38761
rad/s
|
390
mHz
|
2.45044
rad/s
|
400
mHz
|
2.51327
rad/s
|
410
mHz
|
2.57611
rad/s
|
420
mHz
|
2.63894
rad/s
|
430
mHz
|
2.70177
rad/s
|
440
mHz
|
2.7646
rad/s
|
450
mHz
|
2.82743
rad/s
|
460
mHz
|
2.89027
rad/s
|
470
mHz
|
2.9531
rad/s
|
480
mHz
|
3.01593
rad/s
|
490
mHz
|
3.07876
rad/s
|
500
mHz
|
3.14159
rad/s
|
510
mHz
|
3.20442
rad/s
|
520
mHz
|
3.26726
rad/s
|
530
mHz
|
3.33009
rad/s
|
540
mHz
|
3.39292
rad/s
|
550
mHz
|
3.45575
rad/s
|
560
mHz
|
3.51858
rad/s
|
570
mHz
|
3.58142
rad/s
|
580
mHz
|
3.64425
rad/s
|
590
mHz
|
3.70708
rad/s
|
600
mHz
|
3.76991
rad/s
|
610
mHz
|
3.83274
rad/s
|
620
mHz
|
3.89557
rad/s
|
630
mHz
|
3.95841
rad/s
|
640
mHz
|
4.02124
rad/s
|
650
mHz
|
4.08407
rad/s
|
660
mHz
|
4.1469
rad/s
|
670
mHz
|
4.20973
rad/s
|
680
mHz
|
4.27257
rad/s
|
690
mHz
|
4.3354
rad/s
|
700
mHz
|
4.39823
rad/s
|
710
mHz
|
4.46106
rad/s
|
720
mHz
|
4.52389
rad/s
|
730
mHz
|
4.58673
rad/s
|
740
mHz
|
4.64956
rad/s
|
750
mHz
|
4.71239
rad/s
|
760
mHz
|
4.77522
rad/s
|
770
mHz
|
4.83805
rad/s
|
780
mHz
|
4.90088
rad/s
|
790
mHz
|
4.96372
rad/s
|
800
mHz
|
5.02655
rad/s
|
810
mHz
|
5.08938
rad/s
|
820
mHz
|
5.15221
rad/s
|
830
mHz
|
5.21504
rad/s
|
840
mHz
|
5.27788
rad/s
|
850
mHz
|
5.34071
rad/s
|
860
mHz
|
5.40354
rad/s
|
870
mHz
|
5.46637
rad/s
|
880
mHz
|
5.5292
rad/s
|
890
mHz
|
5.59203
rad/s
|
900
mHz
|
5.65487
rad/s
|
910
mHz
|
5.7177
rad/s
|
920
mHz
|
5.78053
rad/s
|
930
mHz
|
5.84336
rad/s
|
940
mHz
|
5.90619
rad/s
|
950
mHz
|
5.96903
rad/s
|
960
mHz
|
6.03186
rad/s
|
970
mHz
|
6.09469
rad/s
|
980
mHz
|
6.15752
rad/s
|
990
mHz
|
6.22035
rad/s
|
1000
mHz
|
6.28319
rad/s
|
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