Video

hang on, isnt nm/sqrt(nm) the same as nm*nm^(-1/2)? which means you can simplify to nm^(1 - 1/2) which is just sqrt(nm) again.

Nyquist noise, in degrees/min/sqrt(Hz)

I have had trouble for ages with the notion of, say, someone telling me: "I'll be gone on holiday from the 2nd to the 17th"... does this mean their holiday starts starting the 3rd and ending the 16th? Or does it mean from the 2nd included to the 17th included? Or worse, does it mean he'll be gone on holiday from the 1st to the 18th? And if the last case seems to be correct, then why don't they say the'll be gone from the 1st till the 18th instead? You get the picture ... Yes I know, it doesn't necessarily have anything to do with "cursed" units, but it shows how confusing (and inaccurate) language can really be ! How about this one then: drips / minute ? Often used in hospitals when putting someone on a baxter feed

You've just reminded of my hatred on Physics formulas and their different units.

Galileo (or gal) is a measure of pressure, also a steradian is the measure of a solid angle - or in SI units m^2*m^-2. You can also express the gas constant in "inH2O⋅ft^3⋅lbmol^−1", I would personally use "nautical miles of Hg * chain^3 * ounce * mol^-1"

I dont know if anyone will see this, but kWh, MWh, GWh, and even TWh are used extensively in the power generation industry for one reason. Its a hell of a lot easier to figure out how long you need to run a generator for to reach your planned energy output in Wh than J... For example, "We planned to generate 300MWh today. So we need to run our 100MW generator for 3 hours..."

an important consideration is geodetic coordinates. We call them latitude and longitude, measure in degrees. And any one who thinks they are angles is, to paraphrase Jon von Neumann, living in a state of sin.

On the same vain of the kilowatt-hours is milliamp-hours which is just 3.6 coulombs.

a video about units and physics had no business being this interesting, and yet I can't click away

An excellent, masterful piece of work!

I realize this video is from a year ago, but I thought I’d give a shout out to a set of attenuation filters I found at work that are labeled in units of “inches/mg/cm^2”.

For the Huble constant, you could argue it was a good linear aproximation....

At some event I once played a genius but somewhat crazy professor who had invented a crazy new machine. It had some warnings and characteristics written on it, I don‘t remembee the exact units we used but instead of saying it needs 2kW of Energy, we used some crazy unit combination with 7 different units, some to the power -5 or something but when you converted ecerything into SI units and canceled everything out you just got basically Watts…

Also I’d like to point out the kWh is not an appropriate measure of capacity or power consumption just for the simple fact that you cannot multiply unlike terms. Ex: What is 3 oranges times 2 apples??? 6 orange*apples??? What in reality is an orange*apple??? It doesn’t exist…therefore neither does a kWh. The only reason we have divisible units like miles/gallon is because you’re unifying the time interval of miles/unit time = x and gallons/unit time = y …then substituting for {unit time} in the first equation with the value from the second gives you miles/(gallons/y) = x (Miles*y)/gallons = x Miles/gallons = x/y Nowhere in that calculation can you end up with a multiplication of terms like Miles*Gallons just as kW*h is equally invalid.

As critical thinking scientists and engineers, I find that none of you ever consider that these equations or units are cursed because they are flawed. When the units don’t pan out, the equation is wrong that’s the whole point of dimensional analysis. Don’t deviate from this fact just because decorated scientists were wrong in the past.

Hint: The reasons these units are cursed is because they are based on false assumptions. When physicists try to make an equation to describe reality and it ends up not agreeing with experimental data, they add constants intended to bring their wrong equation closer to the measured values. Gravity doesn’t exist, the gravitational constant is meaningless and has no bearing on anything in reality, the universe is not expanding nor is it doing so faster the further away something is. He left out why the polarization error equates to approximately sqrt(N) because it probably doesn’t. And the measuring distance of an object in 6 month intervals is invalid if either of the two objects are moving. Dimensional Analysis determines if your equations are applicable or flawed and can’t just be bypassed when it yields inconsistencies.

the units of some constants in CGS units are quite cursed

Did you improvise the music? I like it. It has a silent movie vibe to it. The video is pretty good, too...

I drove a VW Passat GTE for two years and it showed its actual consumption in kWh/100km when you drove. Analog to l/100km. But when the car wasn't moving it showed kWh/h and that really annoyed me.

I had once a practical course during my masters degree where we did compare to calculation methods. One was straightforward without any major problems. The other methods somehow involved a change in exponent during evaluation, leading to a parameter to the power of 0.8-0.9. This results than also in the unit of this parameter to have the same changing exponent. As I found out, this blew not only my mind, but also the mind of the person holding the practical course.

30% less music volume.

it's 2 because you just said 1 au is the radius

Angular acceleration is measured in seconds to the negative second

I received What If as a Christmas gift. It’s hilarious! 😂😂😂

Get a asinment to fit a graf to some datta and I got inte the end that the K Valio had the unit (s^(1/2))/kg

BFBB/km = broken fireball bottle per km. A measure given to a road in a city that expresses your chances of getting a flat on your bike.

En amplificadores operacionales se usan los "Volt/Volt"

the kWh thing makes sense though. with cars its unituitive but imagine you hadd some specific speed that is fairly commonly used like mach1 then a machhour could be thought of as the distancec you travel moving at mach 1 for x amount of time. it's weird at first but it makes sense why you would want to talk about a distance like that. likewise, I can see why kWh, also makes sense. Converting it to Joules would just make it confusing unless we started out with J/s.

Wouldn't the hubble constant in hertz be the number of times per second that a given distance of space expands to twice its size?

I found your channel via the curssed u its and I enjoy your videos.

Hubble time being close to the age of the universe is not a coincidence; it's just not precise.

bruh days/second joule second and once I accidentally made joule/kilogram per second

I hate Ah. Why? Why would you make me divse and multiply by voltage every fucking time

My physics Professor was out of Russia and he showed us a weird trick to convert miles to gallons into inverse Acres

I'm an aerospace engineer. I analyze gas turbines, including turbofan engines. A ton of what I do involves ratios of areas or mass flows, so it's fun to think of fuel efficiency as fuel volume over flight distance. We already think about the capture area of the engine for the total amount of air that is being ingested at the inlet.

op amp noise specifications are similar to the optical example you gave, it is often given by datasheets in the units nV/sqrt(Hz)

the mm^2 is so cursed idk what to do with this knowledge

39:41 Mathematicians are just apparently not allowed to have boring names. Two more of my favorites are the Tits group, and Doob's theorem (relevant in probability theory). Also my first formal foray into abstract algebra was a course taught by Victor Kac I took a couple years ago - he's a nice guy!

hey- but isn't nm/√nm just a √nm ? you could've written just that instead ^^ √nm looks cursed too

kWh was my least favorite thing in circuits ever.

In materials science, fracture toughness is measured in MPa/sqrt(m). If you account for the fact that Pa are N/m^2, you can end up with the unit N/m^3/2, which I’ve always found to be super cursed.

American measuring system, the discussion is closed

cool but what the fuck are kilometers

0:38 That bird dropping calculation is so horribly wrong, and I'm not talking about oversimplifying the numbers. He assumed every possible mouth position on the planet would receive exactly one dropping before any duplicates occur. That's like saying you're guaranteed to roll all six numbers on a fair dice in a row (the probability is actually 5!/6⁵≈0.0154) Also, he was assuming the fatal bird dropping would be the very last out of every possible position. That's like assuming you'd roll a 6 exactly on your sixth roll. Here you have the equivalent of a 3.4×10^17 sided die, around 3.4×10^17 "mouth surfaces per earth surface", if we're talking about weird units. Let's call that ratio "r". According to him there are 1.7532×10^15 "bird droppings per year". Let's call that frequency "f". Now, the probability of getting hit within n years after laying down is P(n)=1-(1-1/r)^(n×f) So the probability of getting hit within n=1 year is P(1)≈0.0051 and the probability of getting hit within n=195 years is still only P(195)≈0.6341

1/c seconds makes sense. It's 1m/(c m/s) = dist the wires are apart 1m / speed of light. That's not weird. What is wierd is that Veritasium is suggesting that if the separation laterally is increase to say 60 light seconds apart the electricity will take 60 sec to turn on the light. I have trouble believing that.

in chemistry we learnt about something called the rate constant which can sometimes have units of dm^6 mol^-2 s^-1 (even worse, the units change depending on the reaction)

17:52 but... Isn't that just square root nanometers? I am curious if there is an interpretation of this

Randall Munroe is the guy who makes xkcd, right?

Except it’s metres of travel per cubic metres of fuel so there’s a second unit in there

kWh makes plenty of sense for electrical engineering...Not cursed.