4 ms·
The kilogram standard is shrinking
- Jun8 16y agoHmm, on a practical level, 50um loss may not be that bad :-) Take, plutonium, which was the most valuable substance I could think of, it's around $4K a gram (http://www.crystalair.com/story.php?id=200701023 http://www.crystalair.com/story.php?id=200701023), so the cost of this loss is about 20 cents.