Hey like my math on the "Beck Mickle hydro generator"? - Page 2 - Electronic Circuits Projects Diagrams Free

Sceadwian · 20th January 2007, 01:04 AM

1 ounce is .911 troy ounces, not exactly a huge difference.

Oznog · 20th January 2007, 03:32 AM

Quote:

Originally Posted by Nigel Goodwin

I feel you're missing the point! - gold is weighed in 'troy ounces', not normal ounces - and they are different. Don't know if 'troy pounds' exist or not, it's not something you really measure gold in!

BTW, the use of 'feathers' was a trap you fell into, he could just as easily said 'lead'.

Yep. Now the thing is, there IS a troy pound and that would be the correct pound to state gold weight in. However, there are only 12 troy oz in a troy pound, whereas there are 16 avoirdupois oz in an avoirdupois pound. Thus, even though an oz of gold is heavier than an oz of feathers, a pound of gold is lighter than a pound of feathers.

Other interesting units, a "gallon" can be US liquid, US dry (rare), or an Imperial gallon (UK). UK vehicles get 20% better mpg because their gallons are 20% larger. Great way to save gas, eh? We should start using their Imperial gallons to help show those oil companies who's boss.

ljcox · 20th January 2007, 03:56 AM

Quote:

Originally Posted by Oznog

Yep. Now the thing is, there IS a troy pound and that would be the correct pound to state gold weight in. However, there are only 12 troy oz in a troy pound, whereas there are 16 avoirdupois oz in an avoirdupois pound. Thus, even though an oz of gold is heavier than an oz of feathers, a pound of gold is lighter than a pound of feathers.

Other interesting units, a "gallon" can be US liquid, US dry (rare), or an Imperial gallon (UK). UK vehicles get 20% better mpg because their gallons are 20% larger. Great way to save gas, eh? We should start using their Imperial gallons to help show those oil companies who's boss.

I rest my case.

Sceadwian · 20th January 2007, 03:36 PM

We should all just switch over to the metric system, these unit differences are absurd. I used to think I'd always be in the American frame of mind, our system after all makes sense to us. Until a few years ago when Nasa screwed up and made a unit conversion mistake which killed a mission. Ever since then I've jumped on the give it all up and go metric bandwagon. The whole 1/16th of an inch thing always ticked me off. mili micro nano pico femto that's all I want to remember. Besides the ones a little further down atto zepto and yocto just sound neat =>
The difference in kgs and lbs and meters and feet are taking me a little while to get used to mentally but I plan on having it all sorted out before I'm in my 30's =)

ljcox · 20th January 2007, 08:30 PM

Yes, in 1964 I became so fed up with measuring in 1/8ths, 1/16ths, etc. that I ordered a metric rule from the hardware shop and have not used imperial since.

One of the best decisions our government made was to convert to metric in the 1970's.

No-one ever refers to temperature in degrees F now, most measure their weight in kg but many, including the young still refer to people's height in feet.

It is just a matter of accepting the advantages of metric (and the hopelessness of imperial) and becoming familiar with metric.

It also pays to remember that Volts, Amps, Watts, Ohms, coulomb, etc. are metric units and fortunately, no-one was silly enough to invent imperial versions.

Hero999 · 20th January 2007, 09:11 PM

Yes, I agree, especially when the US gallon is different to the UK gallon.

I don't have a problem with Fahrenheit, but if I had it my way everyone would measure temperature in Kelvin because they're no negative numbers to worry about.

dknguyen · 23rd January 2007, 06:26 PM

Quote:

Originally Posted by ljcox

Yes, in 1964 I became so fed up with measuring in 1/8ths, 1/16ths, etc. that I ordered a metric rule from the hardware shop and have not used imperial since.

One of the best decisions our government made was to convert to metric in the 1970's.

No-one ever refers to temperature in degrees F now, most measure their weight in kg but many, including the young still refer to people's height in feet.

It is just a matter of accepting the advantages of metric (and the hopelessness of imperial) and becoming familiar with metric.

It also pays to remember that Volts, Amps, Watts, Ohms, coulomb, etc. are metric units and fortunately, no-one was silly enough to invent imperial versions.

Our turf, our rules

. Just try doing electromagnetics in imperial lol.

Pommie · 28th January 2007, 04:10 AM

Even the moon is going to be metric thanks to NASA. See here for more.

Mike.

P.S. The red bits are still imperial.

ljcox · 28th January 2007, 05:50 AM

Quote:

Originally Posted by Pommie

Even the moon is going to be metric thanks to NASA.

I'm completely puzzled as to why they held on to imperial for so long.

Oznog · 28th January 2007, 08:42 AM

Quote:

Originally Posted by ljcox

I'm completely puzzled as to why they held on to imperial for so long.

Because America is an empire, we will never surrender our imperial units!

We will eventually return other countries to these units, one by one if necessary. We will be greeted as liberators.

Hero999 · 28th January 2007, 02:46 PM

We still use imperial in the UK for measuring, distance and speed on roads and the weight and height of people. Like I say I think it's high time to move to 100% metric and the US should join in too.

ljcox · 28th January 2007, 08:02 PM

Quote:

Originally Posted by Oznog

Because America is an empire, we will never surrender our imperial units!

We will eventually return other countries to these units, one by one if necessary. We will be greeted as liberators.

I don't want to be liberated.

I gave imperial away as a bad joke even before the government introduced metric.

It reads like a table of ramdom numbers. 12" = 1 foot, 3 feet = 1 yard, 1760 yards = 1 mile, etc. spare me!

Roff · 28th January 2007, 10:01 PM

Quote:

Originally Posted by ljcox

I don't want to be liberated.

I gave imperial away as a bad joke even before the government introduced metric.

It reads like a table of ramdom numbers. 12" = 1 foot, 3 feet = 1 yard, 1760 yards = 1 mile, etc. spare me!

Len, you forgot 1 millihelen=the amount of beauty required to launch one ship.

bryan1 · 29th January 2007, 06:17 AM

Well after finally reading this post I now I'm right in saying the yanks are so full of themselves, they think imperial measuring is still the best

. Now Pommie has pointed out just how much of the world is still using imperial and outside the US there are only 3rd world countries using it. When I learnt my trade I used both systems and metric is the way to go as reading 18mm on a drawing is much easier then working out what 47/64" is. And the yanks always wonder why they are considered the most arrogant race on this earth.

ljcox · 29th January 2007, 07:04 AM

Quote:

Originally Posted by Ron H

Len, you forgot 1 millihelen=the amount of beauty required to launch one ship.

Yes, I did. I'm glad you reminded me Ron. Perhaps the Troy weight came from the same area.

20th January 2007, 01:04 AM	(permalink)
Sceadwian Experienced Member Blog Entries: 1	1 ounce is .911 troy ounces, not exactly a huge difference. __________________ Curiosity killed the cat; That's why they have nine lives.

20th January 2007, 03:36 PM	(permalink)
Sceadwian Experienced Member Blog Entries: 1	We should all just switch over to the metric system, these unit differences are absurd. I used to think I'd always be in the American frame of mind, our system after all makes sense to us. Until a few years ago when Nasa screwed up and made a unit conversion mistake which killed a mission. Ever since then I've jumped on the give it all up and go metric bandwagon. The whole 1/16th of an inch thing always ticked me off. mili micro nano pico femto that's all I want to remember. Besides the ones a little further down atto zepto and yocto just sound neat => The difference in kgs and lbs and meters and feet are taking me a little while to get used to mentally but I plan on having it all sorted out before I'm in my 30's =) __________________ Curiosity killed the cat; That's why they have nine lives.

20th January 2007, 08:30 PM	(permalink)
ljcox Experienced Member	Yes, in 1964 I became so fed up with measuring in 1/8ths, 1/16ths, etc. that I ordered a metric rule from the hardware shop and have not used imperial since. One of the best decisions our government made was to convert to metric in the 1970's. No-one ever refers to temperature in degrees F now, most measure their weight in kg but many, including the young still refer to people's height in feet. It is just a matter of accepting the advantages of metric (and the hopelessness of imperial) and becoming familiar with metric. It also pays to remember that Volts, Amps, Watts, Ohms, coulomb, etc. are metric units and fortunately, no-one was silly enough to invent imperial versions. __________________ Len

20th January 2007, 09:11 PM	(permalink)
Hero999 Experienced Member	Yes, I agree, especially when the US gallon is different to the UK gallon. I don't have a problem with Fahrenheit, but if I had it my way everyone would measure temperature in Kelvin because they're no negative numbers to worry about. __________________ What's so bad about Microsoft? Get Opera it's simply a superb browser.

28th January 2007, 02:46 PM	(permalink)
Hero999 Experienced Member	We still use imperial in the UK for measuring, distance and speed on roads and the weight and height of people. Like I say I think it's high time to move to 100% metric and the US should join in too. __________________ What's so bad about Microsoft? Get Opera it's simply a superb browser.

28th January 2007, 04:10 AM	(permalink)
Pommie Experienced Member	Even the moon is going to be metric thanks to NASA. See here for more. Mike. P.S. The red bits are still imperial.

29th January 2007, 06:17 AM	(permalink)
bryan1 Experienced Member	Well after finally reading this post I now I'm right in saying the yanks are so full of themselves, they think imperial measuring is still the best . Now Pommie has pointed out just how much of the world is still using imperial and outside the US there are only 3rd world countries using it. When I learnt my trade I used both systems and metric is the way to go as reading 18mm on a drawing is much easier then working out what 47/64" is. And the yanks always wonder why they are considered the most arrogant race on this earth. __________________ " The only way to avoid human error is to avoid the use of humans"

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