By convention, compound SI units (e.g. N•m) are separated by a space or multiplication dot and are not just smashed together. The lack of such a separator in the above example implies the "milli" prefix.
No one uses millihertz and neither meterhertz. If you want to do it correctly the first one would be acceptable for milli as scale. The second one would need to be written as m • Hz.
All metric unit prefixes are possible. Like femtohertz, picohertz, centihertz, decihertz, decahertz, hectohertz, petahertz, zettahertz. Not sure if they are used often.
Well Hz is a frequency per second. It doesn't make much sense to use them for low frequency things but it's still possible. Just most things that happen less than once per second are usually described in units like seconds, hours and more.
I think there's something like 43/500ths of a Bigole Hertz to a regular Hertz; but that's if you're using English Bigoles. I think it's 43.9/500ths for a US Bigole.
12-year-old me when Reading Rainbow guy started wearing a banana clip on his face, and I knew what it was because they had just come into style for girls hair accessories. 🧐
But 12-year-old me gave them the benefit of the doubt, surely it's just a coincidence, This thing that all my friends and I are wearing in our hair, surely Star Trek would not be using that on his face. Surely it must be something much more sophisticated & scientific to assist the blind somehow.
34 Comments
unlucky@lemmy.world · 99 pts · 2y
m•Hz ~ m/s with implied periodicity, mHz would be milliherz
psud@lemmy.world · 5 pts · 2y
To expand on that, 1 mHz would be 1 thousandth of a cycle per second/one cycle per thousand seconds
1m/s is about 3.6km/h or 2.237 mph
Amir@lemmy.ml · 63 pts · 2y
I have no idea if this is meterhertz or millihertz
rockerface@lemm.ee · 14 pts · 2y
yes
TeckFire@lemmy.world · 6 pts · 2y
nHz is Nanohertz 1/1,000,000,000 Hz (Billionth)
µHz is Microhertz 1/1,000,000 Hz (Millionth)
mHZ is Millihertz 1/1,000 Hz (Thousandth)
Hz is Hertz 1 Hz (Base Unit, one per second)
kHz is Kilohertz 1,000 Hz (Thousand)
MHz is Megahertz 1,000,000 Hz (Million)
GHz is Gigahertz 1,000,000,000 Hz (Billion)
THz is Terahertz 1,000,000,000,000 Hz (Trillion)
I suppose there are probably more that I’m not aware of, but I hope this clears it up.
Amir@lemmy.ml · 25 pts · 2y
No, that absolutely does not resolve the confusion between meter (m) and milli (m)
TeckFire@lemmy.world · 9 pts · 2y
I feel like a dumbass
I totally read your comment as “Megahertz or Millihertz”
Now I realize it should just be Meters•Herts or m•Hz
psud@lemmy.world · 7 pts · 2y
Standing alone 'm' is metre.
With a decimal modifier ahead of it, 'm' is metre
Immediately before a symbol it is milli (one thousandth)
mm - the first m is before the metre symbol, it is the milli multiplier, the second m is after a multiplier, so it is the symbol for metre
mHz - the m is before the symbol Hz (for Hertz) so it is the milli multiplier
km - the m is after the K (kilo, thousand times) multiplier, so it is metre
You probably spell metre 'meter', but a meter is a whole different word in English
unlucky@lemmy.world · 4 pts · 2y
By convention, compound SI units (e.g. N•m) are separated by a space or multiplication dot and are not just smashed together. The lack of such a separator in the above example implies the "milli" prefix.
suzune@ani.social · 2 pts · 2y
No one uses millihertz and neither meterhertz. If you want to do it correctly the first one would be acceptable for milli as scale. The second one would need to be written as
m • Hz.tryptaminev@feddit.de · 5 pts · 2y
Millihertz are used for gravitational waves in Astrophysics.
kuberoot@discuss.tchncs.de · 12 pts · 2y
Pretty sure kilo is lowercase, actually.
TeckFire@lemmy.world · 4 pts · 2y
Son of a bitch, you’re right lmao
psud@lemmy.world · 3 pts · 2y
Big K is Kelvins for temperature
TeckFire@lemmy.world · 3 pts · 2y
Kelvinhertz
psud@lemmy.world · 4 pts · 2y
Sufficient Kelvins do hurt, I guess
IWantToFuckSpez@kbin.social · 4 pts · 2y
All metric unit prefixes are possible. Like femtohertz, picohertz, centihertz, decihertz, decahertz, hectohertz, petahertz, zettahertz. Not sure if they are used often.
snugglesthefalse@sh.itjust.works · 2 pts · 2y
Well Hz is a frequency per second. It doesn't make much sense to use them for low frequency things but it's still possible. Just most things that happen less than once per second are usually described in units like seconds, hours and more.
frunch@lemmy.world · 2 pts · 2y
Can Hertz be imperial or are they strictly metric?
Phil_in_here@lemmy.ca · 9 pts · 2y
I think there's something like 43/500ths of a Bigole Hertz to a regular Hertz; but that's if you're using English Bigoles. I think it's 43.9/500ths for a US Bigole.
lolcatnip@reddthat.com · 4 pts · 2y
I'm American and I've never seen any other unit used for frequency unless you count adjectives like "daily".
FiniteLooper@lemm.ee · 4 pts · 2y
I usually just rent from Enterprise. They pick you up!
psud@lemmy.world · 3 pts · 2y
RPM (revolutions per minute) is an old rotational measure
But the second is the same in both systems so I wouldn't be surprised if America called revs per second "Hertz"
saigot@lemmy.ca · 23 pts · 2y
if you are going 100km/h north or south you are revolving around the earth at about 69μHz
TheRealKuni@lemmy.world · 5 pts · 2y
Nice.
fastandcurious@lemmy.world · 21 pts · 2y
You could also use mf
powerofm@lemmy.ca · 20 pts · 2y
synae@lemmy.sdf.org · 12 pts · 2y
When you step on a Lego, you measure the pain in foot-hertz (only in America I guess)
originalucifer@moist.catsweat.com · 8 pts · 2y
but what is that in parsecs
SirBucksworth@lemmy.world · 8 pts · 2y
How about MEGASECONDS ?
TeckFire@lemmy.world · 1 pts · 2y
LemmyKnowsBest@lemmy.world · 7 pts · 2y
12-year-old me when Reading Rainbow guy started wearing a banana clip on his face, and I knew what it was because they had just come into style for girls hair accessories. 🧐
But 12-year-old me gave them the benefit of the doubt, surely it's just a coincidence, This thing that all my friends and I are wearing in our hair, surely Star Trek would not be using that on his face. Surely it must be something much more sophisticated & scientific to assist the blind somehow.
fossphi@lemm.ee · 4 pts · 2y
Oh this hurts my brain. What have you exposed me to!
mvirts@lemmy.world · 3 pts · 2y
mNs/g
corytheboyd@kbin.social · 2 pts · 2y
❌ mid/side
✅ millihertz