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Those pesky Abbreviations!
Those pesky Abbreviations!
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Old 29th August 2021, 07:26 PM   #21
Galu is offline Galu  Scotland
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The dumbell (db) is the unit in which the IQ of a person who continually plays loud music with no regard to their neighbours is measured!

Yes, db with a small b as the unit is not named after Mr. Bell.
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Old 29th August 2021, 07:39 PM   #22
Cal Weldon is offline Cal Weldon  Canada
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Those pesky Abbreviations!
Quote:
Originally Posted by myleftear View Post
I just lookes it up on wikipedia. It unfortunately is way more complicated (to me)
It sure does.
Quote:
Originally Posted by Cal Weldon View Post
They even had to concoct something about different salt solutions to make any sense of it.
Hence my challenge about it being hooey. Who do they think is going to believe that?
My money says Perry Mason would make quick work of this.
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Old 29th August 2021, 07:41 PM   #23
Galu is offline Galu  Scotland
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Quote:
Originally Posted by Enzo View Post
WHen I was learning, Ohm's Law was E=IxR E for "electromotive force".
The SI symbol for electromotive force is ℰ.

Electromotive force (ℰ) is equal to the terminal potential difference (V) when no current flows in the circuit.

Both are measured in volts (V).

No wonder folks say they don't understand physics!
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Old 29th August 2021, 08:01 PM   #24
myleftear is offline myleftear  Switzerland
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Those pesky Abbreviations!
Quote:
Originally Posted by mbrennwa View Post
It is not. Two reasons:

(1) You can use any variable (or "letter") you like to indicate current, as long as the meaning of your variable is clear from the context. "I" is often used as the variable for current, but one should always define it's meaning. There is no universal notation that holds without definition of the variables.

(2) The ampere (A) is the SI unit of the current. There may be other units for current, and "ampere" is not the same as "current".
So I'm back on field one
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Old 29th August 2021, 08:05 PM   #25
myleftear is offline myleftear  Switzerland
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Those pesky Abbreviations!
Quote:
Originally Posted by Galu View Post
The SI symbol for electromotive force is ℰ.

Electromotive force (ℰ) is equal to the terminal potential difference (V) when no current flows in the circuit.

Both are measured in volts (V).

No wonder folks say they don't understand physics!
huh?
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Old 29th August 2021, 08:26 PM   #26
jean-paul is offline jean-paul  Netherlands
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EMF

EMF - Unbelievable (Official Music Video) - YouTube
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Old 29th August 2021, 09:16 PM   #27
haiqu is offline haiqu  Australia
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Those pesky Abbreviations!
As long as you call it current and not "amperage" I don't mind. Sure are a lot of people who use the wrong term out there.
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Old 29th August 2021, 09:44 PM   #28
egellings is offline egellings  United States
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I noticed that electrical units get named after people, and others like foot, inch yard, lumen don't.
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Old 29th August 2021, 09:45 PM   #29
jean-paul is offline jean-paul  Netherlands
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The first few are anglosaxon and refer to body part lengths. A very long time ago in 1820, before the world adopted the metrical system, we had the "thumb" here which is exactly the same as an inch. Problem is that not every thumb is as large as the other and this also counts for feet

Units for things involving light are somewhat rare animals with lumen, candela and lux. Lumen simply means "light" in latin.
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Last edited by jean-paul; 29th August 2021 at 09:54 PM.
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Old 29th August 2021, 09:56 PM   #30
rif is offline rif  United States
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Those pesky Abbreviations!
Let's address the elephant in the room here - time

Measures of time are not metric, and we all use it, US, Imperial, everywhere.

60 seconds in a minute, 60 minutes in an hour, 24 hours in a day, 28, 29, 30 or 31 days in a month

And who knows how long a year is (365 days, 364.25, 52 weeks, 12 months)?
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