free@rss.ponder.catMB to Phys.org@rss.ponder.catEnglish · 11 days agoHow do you make a kilogram? Gravity can provide new answersphys.orgexternal-linkmessage-square0fedilinkarrow-up13arrow-down10
arrow-up13arrow-down1external-linkHow do you make a kilogram? Gravity can provide new answersphys.orgfree@rss.ponder.catMB to Phys.org@rss.ponder.catEnglish · 11 days agomessage-square0fedilink