Recent comments in /f/askscience
[deleted] t1_j71533j wrote
navigationallyaided t1_j7144iy wrote
Reply to comment by radioactive_giraffe in A medical isotope made from nuclear weapons waste (Tc-99m) has a six-hour half-life. How do hospitals keep it in stock? by Gwaiian
I was gonna ask, didn’t DuPont market a technium generator a long time ago for hospitals to use?
HaggisPope t1_j712qfo wrote
Reply to Back in the late 90s, I remember hearing that scientists “cloned a sheep”. What actually happened with the cloning, and what advancements have been made as a result of that? by foxmag86
Dolly the Sheep can now be found in the National Museum of Scotland where the experiments took place. She's taxidermied and slowly rotating on a platform.
I've heard there's some kid sheep related to her still going because they're examining if cloned animals develop in the same way and they're going for several generations to check.
intuser t1_j7123i6 wrote
Ok, now suppose you accelerate the stick closer to the speed of light, towards my barn.
Because of relativity, objects accelerating towards you are smaller than they would if they were stationary. If I'm in the barn and the stick is going fast enough, too me it could be smaller than the length of the barn.
If I close the door once the stick is fully inside the barn, What would happen to the stick. Does it expand? Can it really fit in the barn?
This was from a physics exam back in college 😅
tomdon88 t1_j711vtm wrote
[deleted] t1_j711r8l wrote
[deleted] t1_j711g9n wrote
Reply to comment by radioactive_giraffe in A medical isotope made from nuclear weapons waste (Tc-99m) has a six-hour half-life. How do hospitals keep it in stock? by Gwaiian
[removed]
carrotaddiction t1_j711d9z wrote
Reply to comment by Tupcek in A medical isotope made from nuclear weapons waste (Tc-99m) has a six-hour half-life. How do hospitals keep it in stock? by Gwaiian
and that's without factoring in its biological halflife. Most of it goes down the toilet.
[deleted] t1_j710w8z wrote
Reply to comment by autoantinatalist in A medical isotope made from nuclear weapons waste (Tc-99m) has a six-hour half-life. How do hospitals keep it in stock? by Gwaiian
[removed]
[deleted] t1_j710ay9 wrote
Tupcek t1_j71084n wrote
Reply to comment by Janezo in A medical isotope made from nuclear weapons waste (Tc-99m) has a six-hour half-life. How do hospitals keep it in stock? by Gwaiian
it has six hours half-life. In 24 hours, only 6% remain and in 48 hours 0,4%
zxyzyxz t1_j70z5u2 wrote
Reply to comment by happyhourscience in Back in the late 90s, I remember hearing that scientists “cloned a sheep”. What actually happened with the cloning, and what advancements have been made as a result of that? by foxmag86
Thanks for the answer. What advancements have been made since Dolly in these fields?
autoantinatalist t1_j70z52d wrote
Reply to comment by radioactive_dude in A medical isotope made from nuclear weapons waste (Tc-99m) has a six-hour half-life. How do hospitals keep it in stock? by Gwaiian
What happens if traffic is awful one day and people are an hour late? Is the scheduled injection ruined?
Pigs_in_the_Porridge t1_j70xwgr wrote
Reply to comment by Goodgoditsgrowing in Back in the late 90s, I remember hearing that scientists “cloned a sheep”. What actually happened with the cloning, and what advancements have been made as a result of that? by foxmag86
Well we already have that.
I wasn't privy to their specific research plans but I imagine they had plenty of reasons to try this route. Didn't work anyway.
saxn00b t1_j70ximj wrote
Reply to comment by lankymjc in extremely long stick additional questions? by Unnombrepls
Not to tease you but it makes me giggle thinking about your thought process “surely Einstein didn’t think about sticks”
[deleted] OP t1_j70x4tn wrote
[removed]
atomfullerene t1_j70wkid wrote
Reply to Back in the late 90s, I remember hearing that scientists “cloned a sheep”. What actually happened with the cloning, and what advancements have been made as a result of that? by foxmag86
Aside from the other answers, cloning has gone on to see commercial use and use in conservation (although that's just starting). There are a handful of companies (like ViaGen in the USA) who clone pets and livestock (useful for animal breeders). Cloning has also been done on a few endangered animals, for example a few years back a black footed ferret was cloned.
So the technology has moved out of the lab and into some practical applications.
[deleted] t1_j70wex2 wrote
[deleted] t1_j70vcfe wrote
[deleted] t1_j70v6t9 wrote
TheThiefMaster t1_j70uxmi wrote
Reply to comment by swordsdancemew in extremely long stick additional questions? by Unnombrepls
No that's because of contact friction.
Basically at interstellar scales everything is jelly. It doesn't all move together because it squidges and bends before that could happen.
[deleted] t1_j716wn3 wrote
Reply to comment by atomfullerene in Back in the late 90s, I remember hearing that scientists “cloned a sheep”. What actually happened with the cloning, and what advancements have been made as a result of that? by foxmag86
[removed]