Megahertz (MHz) is a common unit of frequency that represents one million cycles per second and is particularly known for its vital role in telecommunications and computing. The term hertz pays homage to Heinrich Hertz, the first person to conclusively prove the existence of electromagnetic waves. In radio broadcasting, the station dial numbers you tune into represent megahertz, which indicate the carrier frequency of the radio station. For example, a frequency of 101.1 MHz means the wave completes 101.1 million cycles every second!
In computing, the speed of the early personal computers was often measured in megahertz. Though we’ve progressed to gigahertz in modern-day processors, the megahertz era marked some groundbreaking advancements in technology. The original IBM PC, introduced in 1981, had a processor speed of just 4.77 MHz. Today, such performance pales in comparison, revealing the incredible strides in processing power over the decades.
The rotation per minute (RPM) is a fascinating unit of rotational speed that measures the number of complete turns an object makes in one minute. Though RPM is most commonly associated with car engines and records players, it’s a vital metric in a wide array of industries, including aviation, where turbine engines can reach up to 10,000 RPMs. Fun fact: beyond Earth, RPM played a crucial part in the Apollo missions—during re-entry, the command module performed a slow spin at around 2 RPMs to ensure even heat distribution!
In the everyday whimsy of RPM, consider that your average washing machine can spin at an impressive 1,200 RPM during the spin cycle. Additionally, high-speed trains like the Japanese Shinkansen have wheels rotating at about 280 RPM while cruising at speeds over 300 km/h, showing how RPM bridges the gap between mundane household chores and cutting-edge transportation technology.
Megahertz | Rotations per minute |
---|---|
0
MHz
|
0
rpm
|
1
MHz
|
6e+7
rpm
|
2
MHz
|
1.2e+8
rpm
|
3
MHz
|
1.8e+8
rpm
|
4
MHz
|
2.4e+8
rpm
|
5
MHz
|
3e+8
rpm
|
6
MHz
|
3.6e+8
rpm
|
7
MHz
|
4.2e+8
rpm
|
8
MHz
|
4.8e+8
rpm
|
9
MHz
|
5.4e+8
rpm
|
10
MHz
|
6e+8
rpm
|
11
MHz
|
6.6e+8
rpm
|
12
MHz
|
7.2e+8
rpm
|
13
MHz
|
7.8e+8
rpm
|
14
MHz
|
8.4e+8
rpm
|
15
MHz
|
9e+8
rpm
|
16
MHz
|
9.6e+8
rpm
|
17
MHz
|
1.02e+9
rpm
|
18
MHz
|
1.08e+9
rpm
|
19
MHz
|
1.14e+9
rpm
|
20
MHz
|
1.2e+9
rpm
|
21
MHz
|
1.26e+9
rpm
|
22
MHz
|
1.32e+9
rpm
|
23
MHz
|
1.38e+9
rpm
|
24
MHz
|
1.44e+9
rpm
|
25
MHz
|
1.5e+9
rpm
|
26
MHz
|
1.56e+9
rpm
|
27
MHz
|
1.62e+9
rpm
|
28
MHz
|
1.68e+9
rpm
|
29
MHz
|
1.74e+9
rpm
|
30
MHz
|
1.8e+9
rpm
|
31
MHz
|
1.86e+9
rpm
|
32
MHz
|
1.92e+9
rpm
|
33
MHz
|
1.98e+9
rpm
|
34
MHz
|
2.04e+9
rpm
|
35
MHz
|
2.1e+9
rpm
|
36
MHz
|
2.16e+9
rpm
|
37
MHz
|
2.22e+9
rpm
|
38
MHz
|
2.28e+9
rpm
|
39
MHz
|
2.34e+9
rpm
|
40
MHz
|
2.4e+9
rpm
|
41
MHz
|
2.46e+9
rpm
|
42
MHz
|
2.52e+9
rpm
|
43
MHz
|
2.58e+9
rpm
|
44
MHz
|
2.64e+9
rpm
|
45
MHz
|
2.7e+9
rpm
|
46
MHz
|
2.76e+9
rpm
|
47
MHz
|
2.82e+9
rpm
|
48
MHz
|
2.88e+9
rpm
|
49
MHz
|
2.94e+9
rpm
|
50
MHz
|
3e+9
rpm
|
51
MHz
|
3.06e+9
rpm
|
52
MHz
|
3.12e+9
rpm
|
53
MHz
|
3.18e+9
rpm
|
54
MHz
|
3.24e+9
rpm
|
55
MHz
|
3.3e+9
rpm
|
56
MHz
|
3.36e+9
rpm
|
57
MHz
|
3.42e+9
rpm
|
58
MHz
|
3.48e+9
rpm
|
59
MHz
|
3.54e+9
rpm
|
60
MHz
|
3.6e+9
rpm
|
61
MHz
|
3.66e+9
rpm
|
62
MHz
|
3.72e+9
rpm
|
63
MHz
|
3.78e+9
rpm
|
64
MHz
|
3.84e+9
rpm
|
65
MHz
|
3.9e+9
rpm
|
66
MHz
|
3.96e+9
rpm
|
67
MHz
|
4.02e+9
rpm
|
68
MHz
|
4.08e+9
rpm
|
69
MHz
|
4.14e+9
rpm
|
70
MHz
|
4.2e+9
rpm
|
71
MHz
|
4.26e+9
rpm
|
72
MHz
|
4.32e+9
rpm
|
73
MHz
|
4.38e+9
rpm
|
74
MHz
|
4.44e+9
rpm
|
75
MHz
|
4.5e+9
rpm
|
76
MHz
|
4.56e+9
rpm
|
77
MHz
|
4.62e+9
rpm
|
78
MHz
|
4.68e+9
rpm
|
79
MHz
|
4.74e+9
rpm
|
80
MHz
|
4.8e+9
rpm
|
81
MHz
|
4.86e+9
rpm
|
82
MHz
|
4.92e+9
rpm
|
83
MHz
|
4.98e+9
rpm
|
84
MHz
|
5.04e+9
rpm
|
85
MHz
|
5.1e+9
rpm
|
86
MHz
|
5.16e+9
rpm
|
87
MHz
|
5.22e+9
rpm
|
88
MHz
|
5.28e+9
rpm
|
89
MHz
|
5.34e+9
rpm
|
90
MHz
|
5.4e+9
rpm
|
91
MHz
|
5.46e+9
rpm
|
92
MHz
|
5.52e+9
rpm
|
93
MHz
|
5.58e+9
rpm
|
94
MHz
|
5.64e+9
rpm
|
95
MHz
|
5.7e+9
rpm
|
96
MHz
|
5.76e+9
rpm
|
97
MHz
|
5.82e+9
rpm
|
98
MHz
|
5.88e+9
rpm
|
99
MHz
|
5.94e+9
rpm
|
100
MHz
|
6e+9
rpm
|
If you like the website, share it on social media.