▲ 53 ▼ How do I verbally say 2.1 ng/kg (lemmy.world) submitted 2 years ago by andrewta@lemmy.world to c/nostupidquestions@lemmy.world 28 comments fedilink hide all child comments I know the ng means nanogram But I’m curious how would I say the above line of 2.1 ng/kg For context I got it from this paragraph a lethal dose of 1.3–2.1 ng/kg in humans Would it be 2.1 nanogram per kilogram? Also if I wanted to write that as a decimal number how would i write that?
[–] Ephera@lemmy.ml 1 point 2 years ago Well, what I meant with that, is that it's semantically important that it's ng of the substance per kg bodyweight. If it was ng of the substance per kg of the substance, then in proper mathematical physics, the unit would disappear completely. So, for example: 42000000000 ng of the substance / kg of the substance Is equivalent to: 42000000000 * 0.000000001 * kg of the substance / kg of the substance Which means in the end, you just have: 42 As my physics teacher would often say: Is that 42 potatoes or sausages or what is it? A number without a unit is just devoid of meaning... permalink fedilink source parent