You got it mixed up:
Shouldn’t really come as suprise that German engineers use metric system to land in moon.
Units moderator. There should be a units moderator assigned.
- Thread starter l00semarble
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Shouldn’t really come as suprise that German engineers use metric system to land in moon.
Gotta say BTU is my favourite arch enemy. Especially when mixed with anything electrical, ie electric heater with 2000w input power and 31415 BTU’s output. 
How many fahrenheits you can heat 12 gallons of heavy water with the potential energy of 10 000 pound block of gold falling from a height of 1 US survey mile?
How many fahrenheits you can heat 12 gallons of heavy water with the potential energy of 10 000 pound block of gold falling from a height of 1 US survey mile?
Tulex
Solar Wizard
Metric, probably why they landed in the moon and not on it.You got it mixed up:
Shouldn’t really come as suprise that German engineers use metric system to land in moon.
It is amazing the hoops they jump through to support GR.
We now have dark matter no one can find, dark energy no one has detected, a universe that they recently doubled in size because the Webb telescope didn’t show what they wanted it to.
They blamed the manufacturer of gravity probe B because it didn’t show what they wanted it too.
The only thing they don’t consider is the possibility that they are wrong.
Ding-dong.... cannot calculate this... you haven't specified the gravitational pull of the planet that said gold is hovering above. Nor the ambient temperature, nor the shape of the container of the water, not the R-value of the container's material.
The reason they're there is because that's what is observed. Call them a placeholder until we know what really goes on. This is just the way science works.
Might not make perfect sense but it teaches math conversions and fractions better than the simplified metric system. When it comes to temperature a wider scale helps in process control. Plus which it is easy to estimate a yard, foot or inch. I have my body to look at as reference. My stride is a yard, my foot is very close to 12 inches and from my thump tip to the first knuckle is almost a perfect inch.
Plus so much of practical math is based on circles and circles are not metric.
I would say it wastes time with conversion and fractions instead of focusing on the import stuff like understanding what a formula actually means with clearly defined and related units.
For added simplicity you can use the standard value of g(0) 32.17405 ft/s2 and assume that R-value is nearly ideal with zero losses to outside.
The problem is no one is allowed to look for anything else without risking their job
Zwy
Emperor Of Solar
If I heat 1000 gal of thermal storage from 135°F to 185°F, it takes about 420K BTU's.Gotta say BTU is my favourite arch enemy. Especially when mixed with anything electrical, ie electric heater with 2000w input power and 31415 BTU’s output.
How many fahrenheits you can heat 12 gallons of heavy water with the potential energy of 10 000 pound block of gold falling from a height of 1 US survey mile?
I don't agree but I will not argue about it. I am suffering from SAD this morning.
They can. Serious research is done on MOND and the like - however the issue is that when a theory violates principles such as conservation laws, you will get some serious push back if you can't back it up with evidence.
ricardocello
Watching and Learning
The AWG conversions I can never memorize, so i use this
www.rapidtables.com
AWG to mm2 | Gauge to mm conversion
American wire gauge (AWG) to mm and mm2 conversion calculator, chart and how to convert.
www.rapidtables.com
In the hvac industry, 12000 btu’s is a ton.If I heat 1000 gal of thermal storage from 135°F to 185°F, it takes about 420K BTU's.
So a unit of energy is equated to a unit of force, or mass at standard earth gravity.
Perhaps the first 12000 btu heat pump made weighed a ton?
At any rate 12000 btus is almost equivalent to 3.5 kWh. 3.5 is about the gain you get by using a heat pump instead of resistive heat.
Hence 1kw powers a 1 ton heat pump, approximately.
Warpspeed
Solar Wizard
The "ton" came about in the refrigeration industry, because back in the days of horses, your domestic cool box used a block of ice to keep your food cool. So the amount of cooling you got from a certain weight of ice was a useful measure of cooling capacity.
Its all about latent heat of water and ice.
When mechanical refrigeration and air conditioning came along, people still thought in terms of "tons" of cooling capacity.
And your nerdy refrigeration engineer knew that it takes 12,000 BTU to either freeze a ton of water, or melt same.
So indeed, a unit of cooling is definitely directly tied to a mass at standard earth gravity. Strange, but true.
Its all about latent heat of water and ice.
When mechanical refrigeration and air conditioning came along, people still thought in terms of "tons" of cooling capacity.
And your nerdy refrigeration engineer knew that it takes 12,000 BTU to either freeze a ton of water, or melt same.
So indeed, a unit of cooling is definitely directly tied to a mass at standard earth gravity. Strange, but true.
In the case of MOND the evidence is the fact that it works.
The alternative is a very unlikely distribution of dark matter in every galaxy.
Since MOND assumes a different gravitational field the conservation laws are not violated within its structure.
If an engineer designs a bridge and it collapses he takes the blame.
If a physicist were to design a bridge that collapsed he could blame it on a hunk of dark matter.
RV8R
Solar Enthusiast
Yep and they had to learn our system of measurements too
Canada adopted the Metric System in the 70’s
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