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Aristus

(72,277 posts)

7. "Half-life" is a common scientific term that is used for more than measuring radioactivity.

Mon Aug 27, 2012, 10:38 PM

Aug 2012

Length of effective action of medications, for example, uses half-life as a measurement.

Half-life simply refers to the time it takes for 50% of any given substance to dissolve, wear away, evaporate, become inactive, etc.

Once 50% of a given whole is gone, half-life measures the 50% decrease of the remainder, and so on, and so on...

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I don't much like Tom Brokaw [View all] jaysunb Aug 2012 OP

Like a lot of persons of privilege, SheilaT Aug 2012 #1

I always liked the late Peter Jennings--elegant, intelligent and... hlthe2b Aug 2012 #2

I just read a book by his ex-wife, Kati Marton, entitled "Paris: A Love Story" about CTyankee Aug 2012 #32

Yes.. I knew they had a stormy marriage. I'm interested in reading her book after an NPR interview. hlthe2b Aug 2012 #35

It sure is. She has had a very interesting life, to say the least. CTyankee Aug 2012 #37

wow... I did not know that... hlthe2b Aug 2012 #40

There's a lot in this book about Paris and boy, did it make me jealous! CTyankee Aug 2012 #42

He did just say that mitt makes al gore look like a stand up comedian sammytko Aug 2012 #3

He did?! He's usually so.....bland? tblue Aug 2012 #15

Sycophant extraordinaire BlueStreak Aug 2012 #4

I never did. He was always a repuke tightass. Greybnk48 Aug 2012 #5

He was a "tightass" when he was a local reporter jaysunb Aug 2012 #9

Yeah, I remember that. calimary Aug 2012 #26

Not surprised. n/t Greybnk48 Aug 2012 #33

"The half-life of an amoeba" ?!?!? Motown_Johnny Aug 2012 #6

"Half-life" is a common scientific term that is used for more than measuring radioactivity. Aristus Aug 2012 #7

Half life of an amoeba makes no sense in this context, however MNBrewer Aug 2012 #21

Yeah, but it was a "science-y" word... PCIntern Aug 2012 #27

yea Phlem Aug 2012 #8

Pompous Windbag - IMHO KT2000 Aug 2012 #10

i grew up with cronkite and huntley & brinkley...journalists with integrity spanone Aug 2012 #11

I did too but, Brokaw was also jaysunb Aug 2012 #13

I grew up with Brokaw. Jennicut Aug 2012 #30

he seems afraid they won't invite him to their next cocktail party catbyte Aug 2012 #12

He's a news lobbyist for the Republican party. pacalo Aug 2012 #14

Absolutely. zentrum Aug 2012 #22

Exactly. Well said. nt SunSeeker Aug 2012 #23

Like Bob Woodward, IMO. Can't stand his Repuke ass either. n/t Greybnk48 Aug 2012 #34

Saw him this morning, too, and he is, yet again, THE absolute most constipated on-camera commentator calimary Aug 2012 #45

I read he was the lead person in having Keith push out at MSNBC CatWoman Aug 2012 #16

He was. jaysunb Aug 2012 #19

Happy you made a thread out of Cha Aug 2012 #17

LOL ! Just doing my bit. jaysunb Aug 2012 #18

Bootlicker Brokaw Raster Aug 2012 #20

Brokaw has always been a tool Where was George Aug 2012 #24

just out of curiosity, can you expand on Amy Goodman ? Thanks nt steve2470 Aug 2012 #41

Just try and ask her about 9/11 Where was George Aug 2012 #46

Great post dreamnightwind Aug 2012 #43

Glad to see a thread dedicated to this POS dreamnightwind Aug 2012 #25

I can't stand the pompous slurring jackass. Zen Democrat Aug 2012 #28

I, a whole lot, don't like Tom Brokaw madokie Aug 2012 #29

That voice! graywarrior Aug 2012 #31

Goes double for me indepat Aug 2012 #36

I loathe his phoniness and entitlement--he is no journalist librechik Aug 2012 #38

He and Tim Russert co-founded the ... GeorgeGist Aug 2012 #39

In his effort to come off as an elder statesman, AtomicKitten Aug 2012 #44