Gram per watt

**kpmarine** · 06-15-2012, 06:22 PM

Originally Posted by cannabineer

That's why I was careful and said that I mass 90 kilos. Scales are force-measuring devices, as Gastanker has mentioned. They're useful on Earth because the gravitational force is essentially a constant. (It would be cool to weigh something in Oslo and Mexico City: same mass but a 0.4% diff in weight...) To estimate mass in space, some other measuring device that directly quantifies inertial mass would be needed. A useful way of "weighing" spacecraft is to measure the acceleration produced by a constant force, say from a thruster of known force.

Yeah, it clicked after gastanker said what he did. For some reason, my brain refused to comprehend for a second.

**cannabineer** · 06-15-2012, 06:22 PM

For purposes of weed, the convention is useful and universal. But I'd rather buy in Mexico than Oslo.

cn

**kpmarine** · 06-15-2012, 06:34 PM

Originally Posted by cannabineer

For purposes of weed, the convention is useful and universal. But I'd rather buy in Mexico than Oslo.

cn

Buy in mexico, then sell in oslo!

**cannabineer** · 06-15-2012, 06:34 PM

Weed arbitrage.

cn

**kpmarine** · 06-15-2012, 06:38 PM

In theory, the best place to buy weed would be a mountain on the equator, correct?

**cannabineer** · 06-15-2012, 06:44 PM

Originally Posted by kpmarine

In theory, the best place to buy weed would be a mountain on the equator, correct?

Trouble is, Earth's surface gravity field is lumpy.

**rollitup** · 06-15-2012, 07:31 PM

All of this physical science talk, and you guys haven't corrected the guy who says a pound is 448 grams.

A pound is 454 grams.

**Opm** · 06-15-2012, 07:32 PM

Originally Posted by kpmarine

Ah, yeah, I see. It's both, technically. Either way though, I must now maintain that opm was talking nonsense then. By that, I mean his statement was in no way relevant to anything. For the purposes of weed, a Kg can be converted into pounds; making it weight.

Technically, the only reason we use scales to determine mass is because it is the easiest method. Counting all the atoms and multiplying them by avagadro's number is not so fun.
As for relevance, You learned something new and isn't this forum for learning?

**ScoobyDoobyDoo** · 06-16-2012, 06:06 AM

Originally Posted by rollitup

All of this physical science talk, and you guys haven't corrected the guy who says a pound is 448 grams.

A pound is 454 grams.

refer to posts #11 & #15

**Kush2180** · 06-20-2012, 04:09 PM

Originally Posted by cannabineer

Opm is partially right. Pounds are a measure of force while grams measure mass. Americans use pounds for mass as well, but that is an informal convention. Using metric mass for weight is a convention that works, but it's technically not right. Similarly in orbit I'd mass 90 kilos but weigh zip. cn

Ft. Pounds is a measurement of force and Pounds is a measurement of weight

Gram per watt

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